Garden Culture Magazine US 25 by Garden Culture Magazine

Bal ance

in the Garden

/Ë&#x2C6;balÉ&#x2122;ns/ noun

A condition in which different elements are equal or in the correct proportions for plants to thrive. REE COPY

FREE COPY

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CONTENTS

Finding Balance in the Garden

STEALTH SCIENCE PART III

16 Biochemistry of the Cold

WHO’S GROWING WHAT WHERE

THE PRUNING DEBATE

62 I N T HIS ISSU E OF GA R D E N CU LTU RE :

PRODUCT SPOTLIGHTS

9 Foreword

56 Plant Food and Ionic Relations

11 Product Spotlights

62 Biochemistry of the Cold

16 Finding Balance In The Garden

66 Ice Ripening

21 Holy Hemp

72 Best of the Blog: Recycling Food Waste

22 The Plant Carbon Deficit

76 The Pruning Debate

30 5 Cool Finds

82 In Between The Rows

34 Animal Agriculture:What is a CAFO?

86 The Ultimate Symbiotic and Business Relationship

41 Who’s Growing What Where

90 Magical Moss

44 The Climate Controlled Garden

94 Turn Waste into ‘Black Gold’

52 Trump In Denial 7

FOREWORD & CREDITS

FOREWORD

have been a passionate and active indoor gardener for over 15 years, using various equipment to control the environment in my grow room along the way. I was always

aware that without a sealed room it could be challenging to maintain balance. Until recently, I didn’t realize just how out of whack it was, and what a difference a little data can make.

I was given “the Minder,” a small and inexpensive device that data logs the temp, humidity, soil temp, and VPD in my grow room. It aler ts you to values you set as dangerous. It was amazing to see what was going on in there, especially once the light had shut off; mega humidity spikes in the summer months (99%), and ridiculously low humidity when the lights are on during those freezing winter days (20%). I knew this was happening, but when an alarm keeps going off reminding you that the environment in your room is horrible, it helps spring you into action. Data collection is key. Knowing how your room reacts to external conditions will help you as a grower. But only if you understand the readings and how to change your equipment to create balance and harmony for your plants. This edition is full of useful and interesting ar ticles about the impor tance of balance in your garden. From lighting to fer tigation, everything has a sweet spot. Knowing how to dial it all in at the right time is the key to squeezing out every ounce of your plants’ potential. As a whole, it can be overwhelming, but addressing each element, understanding its impor tance, and mastering it is essential. So read on, my friends, and become the gardening masters your plants want you to be. Eric 3

CREDITS Special thanks to: Albert Mondor, Andrew Abramson, Anne Gibson, Caroline Rivard, Catherine Sherriffs, Dr. Callie Seaman, Evan Folds, Matt Mountain, Rich Hamilton, Simon Hart, Stephen Brookes, Tom Forrest, and Tom Wall. PRESIDENT Eric Coulombe eric@gardenculturemagazine.com +1-514-233-1539 E XCU T I V E ED I TO R Celia Sayers celia@gardenculturemagazine.com +1-514-754-1539 ED I TO R Catherine Sherriffs cat@gardenculturemagazine.com DESIGN Job Hugenholtz job@gardenculturemagazine.com D I G I TA L & SO CI A L M A R K E T I N G CO O R D I N ATO R Serena Sayers serena@gardenculturemagazine.com +1-514-754-0062 ADVERTISING ads@gardenculturemagazine.com PUBLISHER 325 Media INC 44 Hyde Rd, Mille-Isles QC, Canada J0R 1A0 GardenCultureMagazine.com ISSN 2562-3567 (Print) ISSN 2562-3575 (Online) Garden Culture is published six times a year, both in print and online. @GardenCulture

@GardenCulture

@GardenCultureMagazine

@Garden_Culture

D I ST R I B U T I O N PA R T N ER S • • Hawthorne Gardening Co • • Hydrofarm

Rambridge Biofloral

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, magnetic tape, mechanical, photocopying or otherwise, without prior permission in writing from 325 Media Inc.

GARDEN PRODUCTS

E D I TOR S

PI C K

P&L Grow Sys te m s introduces th

eM inder

Once again, I have found a product I can not live without. Accurate data is key if you really want to know what is going on in your growing environment. Especially when things are going wrong or are not perfect.The Minder is an inexpensive tool that allows you to see the air temperature, humidity, soil temperature (or nutrient temp) and VPD in your grow room on your phone, iPad or computer, 24/7. It will also alert you if something is wrong and has a nifty display that will show you if your environment is not optimal for your plants. Logged data and easy to read charts make exactly what is going on in there very clear. This little device has taught me more about my grow room dynamics than any product! I didn’t realize how quickly the humidity rose in my room at night or how the temperatures vary depending on outdoor conditions. What I learned from the Minder enabled me to make small modifications to my equipment. Now, my grow room environment is way more stable and I absolutely saw a difference in quality and yield in my last harvest. I highly recommend this product to all growers who do not monitor and data log their environmental conditions. Eric

P&L Grow Systems: Access your grow from anywhere in the world.

e at Hydrofarm iv us cl Ex g a Roots Organics CalM Ideal for fast-growing and heavy feeding plants, CalMag is a pure and all-natural blend of calcium, magnesium, and sulfur to suppor t plants during fast growth. CalMag is derived from kieserite and gypsum and is free of added nitrogen, phosphate, and potassium. This gives you control to supplement as needed without affecting primary fer tility input ratios. Use in combination with high-quality base fer tilizers like Roots Organics Buddha Grow and Buddha Bloom. CalMag is Registered Organic Input Material by the California Depar tment of Food and Agriculture, so it’s appropriate for use in organic production and is verified to comply with the California Fer tilizing Materials Law and Regulations and USDA National Organic Program Standards. For more info, visit Hydrofarm.com

DLI Joule & CRI Dutch Lighting Innovations introduces 2 new lights in their HID series known as the Joule and CRI. 1000w, 630w, 315w and soon to come, 750w models, all feature the patented technology found in the #FLOWERSONLY reflector. Exactly as implied, this grow light is specifically made to operate for horticultural use on flowers and has improved all aspects of efficiencies that high-end growers demand in their gardens. Whether for indoor or greenhouse use, see why DLI’s are turning some heads. Check out phive8.com to learn more.

CYCO

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GARDEN PRODUCTS

Created with outdoor commercial and greenhouse growers in mind. A slow-release, organic based granulated fertilizer designed to provide your plants with the same high-quality inputs you have come to expect from the CYCO brand of fertilizers. •

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yco Vegetive is a unique blend of materials specially formulated for vigorous, C sustained vegetative growth. A concentrated non-synthetic product, Cyco Vegetive also encourages microbial activity leading to better overall well-structured soils. Cyco Flowering is a specially blended fertilizer with boosted levels of soluble potash specifically added to aid flower and fruit development. Cyco Seeweed Mix combines manure, Kelp and fish tankage to help maximize your plant’s unique visual and aromatic traits.

Available in 10 Kg and 20 Kg Bags.Visit CycoFlower.com for more information.

, re tu x Fi W 0 3 6 E D H M C r a in m Ilu Lighting System Professional Grade

Ceramic Metal Halide’s (CMH) lamps are the newest lamp tech to hit the indoor growing market. In the past 5 years, they have grown in popularity the world over. CMH light spectrum is designed to be closer to sunlight - plants receive a broader range of wavelengths of truly usable light. CMH lamps provide more UV light compared to other types of grow lights. Compatible with CMH, HPS, and MH lamps. When a larger yield is desired, the ILUMINAR CMH DE Fixture competitive edge is the solution. Iluminar’s CMH range includes the 315 Single Lamp, the 630 Dual Lamp and the 630 DE. Visit StellarInc.ca for more information.

Grotek

Precision Nutrients

Hydrofarm now offers the Grotek Precision line, a 3-part system of base nutrients designed to be a full-cycle fertilizer package. Suitable for soilless and hydroponic production systems, Grotek Precision supplies essential micronutrients in optimized ratios to meet the demands of heavy feeding crops. The system consists of three components: Precision Micro provides nitrogen, potassium, and added calcium for plant structure and growing fruit; Precision Grow delivers phosphorus, potassium, magnesium, and high levels of nitrogen for lush, green growth in the vegetative stage; and Precision Bloom provides phosphorus, potassium, sulfur, and magnesium for increased production of flowers and fruit. All three formulas include kelp extract for trace elements and phyto-active compounds for maintaining healthy plants. Grotek Precision nutrients are highly concentrated – 1L makes 500L of solution. Available in seven sizes, from 500ml to 1000L. Visit Hydrofarm.com for more information.

arm f o r d ic Hy trateg ces S n u o n An h ip wit h s r e s Partn

trol n o C rg u s

Advanced environmental systems and services for horticultural production in the United States and Canada Argus provides advanced environmental control systems that are customized to each growerâ&#x20AC;&#x2122;s requirements while also being adaptable to changing needs. Combining a thorough understanding of greenhouse and indoor growing environments with unique technology for irrigation control and nutrient management, Argus provides a complete controls solution for a full range of hor ticultural facilities. â&#x20AC;&#x153;Argus and Hydrofarm are aligned in our deep hor ticultural history and passion for technological advancement. Our mission is to provide the best hor ticultural automation systems with best in class results. Together with Argus, we are able to provide clients with a customized controls solution that will enable them to achieve their goals,â&#x20AC;? said Hydrofarm CEO Peter Wardenburg.

M.O.A.T

GARDEN PRODUCTS

Mother

12.0 x 6.0 x2.4m / 39,44 x 19,82 x 7,10ft.

of all Te

nts

The Mammoth Elite HC1200L is the largest high-quality tent in the industry. The modular (connectable) system and 100% water-proof floor allows you to expand the M.O.A.T. at all sides! Sufficient height and smartly positioned ventilation in-/outlets for better air handling and installation of cooling systems. With a heavy-duty framework, a 100% light-proof sealing, and Panda Webbing and Mylar for optimized reflection, this mobile climate room is the Mother of all of tents. Visit MammothTent.nl for more information.

EZ-clone Commercial Pro After countless hours of research and testing, the team at EZ-CLONE brings you a plug and play professional cloning work-horse that can yield successful results with any cultivar youâ&#x20AC;&#x2122;re running. Featuring 459 clone sites distributed amongst 3-153 site vertically integrated trays. Each tray is irrigated with a high-pressure 65-micron fine mist. The sliding drawers can be disengaged and pulled out with a quick push of a button for ergonomically friendly observations and maintenance. Comes fully assembled with 6-21watt,T5 lights and an outboard motor with the rotary pump head. Single 19-gallon reservoir makes operating this machine simple and efficient. Outfitted with heavy-duty rolling casters on a powder coated steel frame. Large scale cloning has never been so easy.

oot R i d e R

Plastic

Hydrofarm now offers RediRoot Plastic Air-Pruning Containers. The slatted design reduces and often eliminates circling roots and provides an ideal environment for air root pruning to occur. Air root pruning is a process where a plantâ&#x20AC;&#x2122;s roots are pruned as they grow rather than when they are transplanted: when a root tip comes in contact with the air, it sends a signal to the plant to produce more lateral roots, creating a dense, fibrous root structure. Healthier roots reduce transplant shock, leading to healthier plants and increased yields. RediRoot features raised feet for 360-degree aeration, allowing your growing medium to dry evenly, drastically reducing the possibility of wet spots and root rot. Made from recycled materials, RediRoot Air-Pruning Containers are BPA-free and UV resistant.

A i r - Pr u n i ng Contai ner

Visit Hydrofarm.com to find out more. 13

Product Spotlights See the most recent Product Spotlights right from your phone or tablet.

NEW visit: GCmag.co/Product-Spotlight

Product spotlights

BY TOM WALL, COSMIC KNOT

FINDING

BALANCE

IN THE GARDEN Are you looking for an edge on your garden this year? Then strive for balance, something achieved through keen observation of Mother Nature.

BALANCE IN THE GARDEN

ver since the beginning of modern agriculture, farmers have been looking for ways to manipulate nature to improve gardening productivity. The majority have relied heavily on the use of harmful chemicals and pesticides to increase yields, while also ridding their fields of problems and pests. But why are these problems occurring in the first place?

Many mainstream farmers and gardeners are ignoring Mother Nature’s warning.

N-P-K levels have been the standard measurement of fertilizer since the 1800s, but it ignores a massive part of the equation when it comes to gardening elementally. As many of us already know, the abbreviation “N-P-K” stands for nitrogen, phosphorous, and potassium. They represent only three of 115 elements in the elemental chart, and yet many gardeners believe they are the key to achieving balance. In the grand scheme of things, a balance of all essential elements is necessary, and this is where synthetic gardening and organic gardening contradict each other. In synthetic gardening, there are three macroelements and generally up to 15 microelements that are said to be of use with no regard for the biology required to assimilate them. However, in a forest, it takes a proper balance on many levels to achieve the uninhibited growth every gardener wants. One can best learn to promote balance by observing and understanding Mother Nature in a natural, unhindered state. Only then can a more natural balance be created in the garden, as well as in our bodies. Natural balance in a garden leads to healthier, happier plants with less stress and disease. Studies have even shown how produce grown in a naturally-balanced environment has a greater potential to provide us with more nourishment once consumed. What we put into our plants is what we get out of it them. An average synthetic nutrient has roughly 13-15 elements out of the 115 possible. However, by using proper compost tea prepared with the right organic ingredients, that number can potentially reach over 100, leading to better nourishment for your plants and better food for your body. It’s similar to taking natural vitamins right from the source in the best form possible. Plain and simple, balance is harmony, and that is what nature is ultimately striving for. It is essential for vitality in all life.

In synthetic gardening, there are three macroelements and generally up to 15 microelements that are said to be of use with no regard for the biology required to assimilate them

credit: The Findhorn Community

If there is a problem in the garden, it’s directly related to an imbalance. Whether it’s too many pests, not enough nutrition, or too much salt, an imbalance is to blame. Most gardeners assume they lack something when things aren’t going right, but more often than not, that is not the case. To understand what causes an imbalance in the garden, we have to look beyond the standard N-P-K levels, and this is where organics and biodynamics come into play.

The Findhorn Foundation is a Scottish charitable trust registered in 1972, formed by the spiritual community at the Findhorn Ecovillage, one of the largest intentional communities in Britain

Long before the use of synthetic chemicals, people relied on keen observations of celestial cycles, as well as weather and growth patterns in their surrounding environment. Through these observations, farmers learned to work in harmony with Mother Nature, and many bio-dynamic and organic farming practices were born. Bio-dynamics is a belief that a garden isn’t just a thing, but a living, breathing entity all of its own. When we follow the natural guidelines, truly astounding results can be achieved in the garden. Many world records for vegetables have been set through natural organic and bio-dynamic practices, and entire communities have been built around gardening in this way, such as The Findhorn Community.

Natural balance in a garden leads to healthier, happier plants with less stress and disease

When we truly understand our surroundings, Mother Nature can teach us how to nourish the land naturally. By composting various forest items, using fine rock powders containing a plethora of essential elements, as well as organic compost teas, farmers can learn to grow highly nutritious food completely free of chemicals. It takes an intent observation, but amazing results have been achieved through these age-old practices. Planting and harvesting dates, as well as applications of compost and teas, are generally based on particular planetary and lunar cycles. The direction in which you spin the water while mixing nutrients has been shown in studies to be influential on your garden as well. Clockwise rotation is said to promote flowering plants, while a counter-clockwise rotation is supposed to support plants that are in vegetative stages. Bio-dynamic farmers have even suggested that singing the right tones while applying

BALANCE IN THE GARDEN

One can best learn to promote balance by observing and understanding Mother Nature in a natural, unhindered state

FINDING

BALANCE

IN THE GARDEN teas can imprint the water and the plants with vibrations that seem to affect the garden positively.

BIO Tom Wall: Professional Musician, Writer and Gardening Consultant. Cosmic Knot/Therapeutic Horticulture Consultations

There are many aspects of nature we don’t quite understand, and yet, nature is all there is, and we are all connected as an integral part of it. We need to rekindle our connection with nature to get back to balance. Natural gardens can make that possible. The connection is all around us. Studies have found the sound of crickets singing at night helps signal plants to open their stomata and take in the settling dew from the day. It is assumed the birds announce the morning’s arrival and prepare the plants for the day. These are just a few of the many examples proving there is so much quietly going on around us. If we slow down and look just right, we might find the key to balance right at our feet. 3

Growing up on a deer farm located on 79 acres of land along the banks of one of Lake Michigan’s tributaries, Tom grew a love for nature and all the beauties it could hold. Through that passion Tom has channeled his influences into educating the community on sustainable agriculture, becoming an activist, writing for magazines and creating music tuned to nature in his band Cosmic Knot. Follow Tom and all of his passions: https://www.facebook.com/tom.wall.946 https://www.instagram.com/cosmicknotmusic/ artistecard.com/cosmicknot

â&#x20AC;?After 25 years we have made the best product ever!â&#x20AC;? Eric, founder Bio Nova

With Veganics we take organic growing to the next level and set a new benchmark for the whole industry. We have captured the natural power of the building blocks of all life, marine phytoplankton, and have created a unique and pure blend. The purest nutrient for a clean and pure yield.

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Mixed with pure low saline seawater

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Holy Hemp! With legalization, hemp has the potential to be a significant cash crop in the US

Cultivation Legal in the US

ince 1970, the DEA has treated it the same as marijuana, LSD, and even heroin. But the cultivation of hemp is now legal in the United States.The legalization

was part of the 2018 farm bill, signed into law by President Donald Trump in December.

Hemp is part of the cannabis family, but it doesn’t have the same psychoactive effect as marijuana, meaning it won’t get you high. What it does contain is CBD, the non-psychoactive compound believed to hold many medicinal benefits. Research has shown CBD oil can provide pain relief, fight cancer, and help people overcome anxiety and insomnia, among other ailments. Beyond medicine, the ‘super plant’ has many different uses. The crop is said to have the power to rejuvenate the earth by cleaning toxins out of the soil, a process called phytoremediation. Foods made with hemp are both delicious and nutritious. Rich in protein and other essential vitamins and minerals, hemp can be consumed by way of seed, oil, and flour. The plant can also be used in fibers, fuel, bio-plastics, and building materials, to name a few. With legalization, hemp has the potential to be a significant cash crop in the US, and the research opportunities into its properties and benefits are now plentiful. The times they are a-changin’! 3 Sources: CNN: cnn.it/2R49qhr Canabo Medical Clinic: bit.ly/2u965zn Hemp Foods Australia: bit.ly/2F5mkoa

energy

O H2

The Plant Carbon Deficit

lants use light energy to conver t Two electrons per hydrogen atom (H) Four electrons per water molecule (H 2 0) Two water molecules for one oxygen molecule (O) Eight electrons are equal to eight photons for each oxygen; every glucose (C 6 H12O 6) has six oxygen (8×6 = 48)

CO2 and water into carbon sugars (carbohydrates). The energy level

a plant has is dependant on the amount of sunlight it receives or, if growing indoors, how many lights are being used and their wattage. Each ‘packet’ or ‘parcel’ of light is called a photon, and it takes 48 photons of light to make one molecule of sugar.

Carbon Sugars

How much of an impact do deficiencies, toxicities, abiotic and biotic stresses have on the plant and how much power is required to fix these issues?

BY STEPHEN BROOKES, NPK TECHNOLOGY

The more light, the more photons and the more potential energy the plants have for growth. The question we have to answer is what does the plant do with that energy? How much of an impact do deficiencies, toxicities, abiotic and biotic stresses have on the plant and how much power is required to fix these issues?

A plant deficient in nitrogen sends all its streng th to the roots searching for more, which of ten leads to stunted or reduced grow th

What we consider to be a simple nitrogen deficiency might use a lot of energy to repair, which could otherwise be used in the roots, the stem, for leaf growth, flowering sites, fruit size, and even oil production.

Plant Problems and the Carbon Budget Deficiencies and Toxicities If we look at the main elements required for plant growth (N, P, K), we’ll see what they each do and what happens when they are lacking or in excess. Nitrogen (N) An essential constituent of both chlorophyll and amino acids, the building blocks of proteins. Therefore, a lack of nitrogen in the simplest form means less chlorophyll and a reduced ability to absorb the photons emitted by the sun, resulting in less energy. A plant deficient in nitrogen sends all its strength to the roots searching for more, which often leads to stunted or reduced growth. Meanwhile, an excess of nitrogen also stunts the plant by reducing the amount of energy it has. Plant energy comes in the form of ATP (Adenosine triphosphate), and when there is too much nitrogen, ATP can’t correctly form. Instead, it develops AMP and ADP (Adenosine monophosphate and Adenosine diphosphate) which is one phosphate molecule and two phosphate molecules instead of the three phosphates of ATP. In simple terms, this is the equivalent of us consuming either Mars Bars (AMP), McDonald’s (ADP), or Sunday’s roast dinners (ATP). The roast dinner is a much better fuel source for us, just as ATP is for plants.

credit: Kiwicare

Therefore, nitrogen deficiency and toxicity impede the plant’s ability to conver t light into carbon energy, leading to lower amounts of energy for vital plant processes.

credit: WikiGardener - Fandom

PLANT CARBON DEFICIT

Phosphorus deficiency

Phosphorus (P) Phosphorus is par t of the ATP molecule which is the plant’s energy currency. A lack of phosphorus means an absence of available ATP, and therefore, sugars can accumulate in the plant, manifesting themselves as a purpling of the stems and leaves because they are unable to turn into complex carbohydrates. Unfor tunately, because phosphorus is so vital for energy conversion within the plant, root growth will slow and leaf size and numbers will dramatically reduce. Prolonged ‘P’ deficiency results in reduced yields and slower maturation. Phosphorus toxicity is rare, but when it happens, impedes the uptake of other nutrients such as copper (Cu) and zinc (Zn). A reduction of zinc, for example, reduces the formation of chlorophyll and some carbohydrates because the plant struggles to conver t starches to sugars. Potassium (K) Potassium has many roles, but the regulation of stomatal openings is one of its most impor tant jobs. It performs this task by regulating the proton pumps to make the guard cells (cells that surround the stomatal openings) placid or turgid, or, open or closed. When open, the stomata allow CO2 to diffuse in and water vapor to escape. When they are closed, they prevent the plant from losing water. For this reason, reduced potassium levels can affect stomatal regulation, and therefore, the plant won’t have access to optimal levels of CO2 , which is where they get the carbon to produce carbohydrates. An overdose of potassium is also rare, but it can inhibit uptake of iron (Fe). Iron is a central element to chlorophyll production, and reduced absorption impairs the plant’s ability to photosynthesize, in turn reducing the number of available carbohydrates.

Nitrogen deficiency

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Prolonged ‘P’ deficiency results in reduced yields and slower maturation Topping

credit: Stuff Stoners Like

PLANT CARBON DEFICIT

topping and fimming are stressful techniques that diver t energ y away from grow th to focus on repairing

To summarize, a deficiency or excess of Plant Training Planning your any element can impair the plant’s abiliplant ‘stress’ ty to absorb energy and conver t sugar to Plant training and manipulation have a sigdays helps the complex carbohydrates. With less than a nificant impact on how the plant spends its plant manage its full tank, completing various growth stagenergy. For example, topping and fimming carbon resources es is challenging, if not impossible. are stressful techniques that diver t energy When in the vegetative cycle with a phoaway from growth to focus on repairing. more ef fectively toperiodic plant, you can keep the plant in For most growers, this is an acceptable and recover more its current state longer to give it time to diversion and use of resources thanks to ef ficiently repair and recuperate before allowing it various benefits and outcomes. Topping to flower. If these symptoms occur during requires the plant to use a lot more energy flowering, the plant will likely never reach its full genetic to recover compared to the fimming technique, and so the potential. grower should choose which method best suits their needs for their grow, taking the plant’s carbon pool of resources Top Tip: Identify and resolve as many problems during the into consideration. vegetative stage before the plant flowers. Once flowering begins, the clock cannot be turned back; any mistake will Top Tip: Planning your plant ‘stress’ days helps the plant have an impact on final yield and quality. manage its carbon resources more effectively and recover more efficiently. For example, a grower that has patches of Biotic stresses powdery mildew but also removes excess foliage, continues to scrog, and switches the plant to a flowering light pattern Pests and disease all at once has rerouted a tremendous amount of energy When pests and disease attack a plant, they have an impact on away from growth to repair. As a result, the plant is often plant health and vigor. However, a plant diverts its carbon enershocked into a more extended recovery period than if each gy to defend, repel, and restore itself to full health. The severity stressor had been managed into a schedule as follows: of the attack dictates how much of the plant’s carbon resources (energy) are spent on trying to heal and repair. • The powdery mildew (PM) is identified and resolved while scrogging lightly continues. Similar to deficiency and toxicity, a plant can recover from • Defoliation is left until all PM has been eradicated. even the worst infestations and fungal/bacterial attacks in • After a few days of recovery, defoliation can star t at the vegetative period. We can manage the problem effecleast a week before the light schedule turns to a flowtively while also giving the plant time to repair. The real ering 12/12. problem occurs in flower when the plant’s energy resources • Fur ther defoliation is left until scrogging has stopped, are limited to 12 hours of light a day, and the harvest date is which is usually two to three weeks after the 12/12 light within a few weeks. Any issues must be resolved before harpattern has star ted. vest with as little amount of stress on the plant as possible so that precious energy is not diver ted. Using the above schedule, the plant doesn’t have as many stressors at the same time and can use the carbon energy Top Tip: Many growers give their plants the most attention efficiently to recover fully. during the vegetative cycle as they train and grow to the desired size within a specific period. Much attention is also provided Simply put, an athlete won’t train for a marathon, a sprint, during the first two weeks of the flower so that stretching is and a weight lifting competition at the same time, so why minimized and that the transition period is smooth. Many growforce a plant to undergo so many stressing factors at once? ers are quite relaxed during the flowering weeks that don’t require as much interaction, but this is when we should be giving the plants the most TLC, as any problems that arise at this time take energy away from yield and quality.

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PLANT CARBON DEFICIT

Plant training and manipulation have a significant impact on how the plant spends its energ y

Abiotic (Environmental)

Acceptable stress

Potential abiotic or environmental stressors are many. They include a plant being over or under watered, growing conditions being too hot or too cold, aggressive or not enough air movement, inadequate supply of CO2 and humidity, or more impor tantly, VPD (vapor pressure deficit) being in a dangerous zone for transpiration. Addressing each one requires multiple ar ticles, but the message is the same. If we burden our plants by forcing them to cope with less than perfect environmental conditions, then growth is stunted as the plant’s stored energy is used for defense.

Acceptable stress is when the grower knowingly places the plant under stressful conditions to cause the desired outcome. For instance, one can achieve an increase in oil production by using UV lamps. As the plant defends itself from the harmful rays, oil and resin production rises dramatically. While the energy may be diver ted from growth and yield, it can cer tainly create better taste and aroma, which is often a very welcome use of a plant’s carbon budget.

For example, when it is sweltering (82°F) and humidity is low (<39%), the plant uses energy to force the guard cells closed, which reduces transpiration and CO2 uptake, and therefore, respiration (growth). Not only has the plant expended energy, but now the rate at which it photosynthesizes is practically zero, so it moves towards a negative carbon deficit.

Deficiencies, biotic, and abiotic stress can impact a plant negatively and result in slow growth or low yields. Always remember to consider a plant’s ‘carbon budget’ and that its energy supply is finite. What may appear to be a small problem can prevent the plant from reaching its full genetic potential, impacting overall yield, harvest time, flavor, and aroma. 3

Conclusion

BIO Stephen Brookes is a science fanatic, hydroponics obsessed bookworm. His experience comes from running two grow shops, an additives company, and NPK Media. Along with obtaining a bachelor degree of Science in Outdoor Education and Geography and an MSc in Nutrition and Scientific Investigation, he is now working on a PhD, researching the effects of different ratios in cannabinoids on the human body. Motto: The more you learn, the less you know!

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Animal Agriculture

With human waste, we use sewage treatment facilities, but for some reason we allow animal waste to be administered directly into the environment completely unprocessed 34

ANIMAL AGRICULTURE

What is a CAFO?

ne of the primary ways that modern agriculture has become compromised is a general lack of attention towards balance and diversity. Rather than rely on the wisdom of Mother Nature to produce her abundance, our efforts involve the faulty logic of increased yields at all costs and the use of artificial

methods that push and disturb to the point of degeneration in an attempt to grow living systems.

This reality is taken to the extreme in CAFO’s, or “Concentrated Animal Feeding Operation”. The term CAFO is often used loosely to describe any factory animal farm, but it actually has a designation from the Environmental Protection Agency (EPA) as a farm with over 1000 “animal units”, or an animal equivalent of 1000 pounds live weight, that is raised in confinement for over 45 days a year. CAFO is also defined as an animal farm that discharges manure or wastewater into a natural or man-made ditch, stream or other waterways, regardless of size.

CAFO is also defined as an animal farm that discharges manure or wastewater into a natural or man-made ditch, stream or other waterways

In other words, rather than raising animals in a field on a natural diet, most livestock in the United States is fed an unnatural diet, kept alive using heavy doses of toxic rescue chemistry, and kept mostly in confinement. This is the process by which most meat in the United States is produced. Beyond the moral implications of such an approach, it produces untold contamination in the environment, in our food system, and in the people who eat it. I live in Wilmington, a historic por t city at the mouth of the Cape Fear River in southeastern Nor th Carolina. The Cape Fear is 202 miles long with a watershed covering over 9,100 square miles across eastern Nor th Carolina, flowing right through downtown Wilmington and directly into the Atlantic Ocean. The river is home to countless diversity of organisms and ecosystems, truly an invaluable natural resource for the citizens of Nor th Carolina, but despite its beauty, the Cape Fear is one of the top 50 most polluted rivers in the United States.

Wilmington has massive water quality issues. We made headline news in 2014 when Duke Energy spilled toxic coal ash into the Dan River, a tributary of the Cape Fear. We experienced another coal ash spill recently from the devastating flooding from Hurricane Florence that dumped eight months of rain on us in three days.

We were again in the news in late 2017 for the discovery of a contaminant called GenX in our drinking water system. GenX is in the category of chemicals known as PFAS, or poly- and perfluoroalkyl substances. GenX is used in the manufacturing of fluoropolymers such as Teflon and produced by Chemours, a DuPont spinoff created to deflect potential liability. Watch the documentary The Devil We Know for more on this emerging threat and the history of litigation against PFAS manufacturers. There are thousands of these substances showing up in water systems everywhere, and we know very little about them. But the most harmful pollutant we face here in regards to water quality is the waste stream generated by industrial animal agriculture. Nor th Carolina ranks first in the nation in egg production, second in hog and turkey production, and four th in production of broiler chickens, with all sectors increasing year after year. There are more pigs than people in Nor th Carolina. And similar to commercial vegetable and commodity farms, the animal agriculture industry is consolidating at a rapid pace. According to the USDA, it took one million farms to house 57 million pigs in 1966; by the year 2001, it took only 80,000 farms to accommodate the same number.

The CAFO farming model was born in the United States but is now spreading around the globe.

ANIMAL AGRICULTURE

Concentrated animal waste is highly toxic, so there are limits to the amount of animal waste that can be sprayed onto crop fields over time.

This boom in production brings economic benefits, but also dire environmental consequences. The animals produce mind-boggling amounts of waste every year, all of which is vir tually unregulated primarily due to the multi-billiondollar influence of industry over our State government. An analysis by Environmental Working Group shows that wet waste in Nor th Carolina’s industrial agricultural operations produces almost 10 billion gallons of fecal waste yearly, enough to fill more than 15,000 Olympic-size swimming pools.

According to the USDA, it took one million farms to house 57 million pigs in 1966; by the year 2001, it took only 80,000 farms to accommodate the same number

There are now over 10 million hogs, over 16 million turkeys, and 300 million chickens produced annually in the Cape Fear River Basin. Cape Fear Riverkeeper Kemp Burdette says that the hog waste volume alone represents a human waste equivalent of 60 million people being crammed into southeastern Nor th Carolina east of Interstate 95. That is more than six times the population of New York City! With human waste, we use sewage treatment facilities, but for some reason we allow animal waste to be administered directly into the environment completely unprocessed. According to our local watchdog group, Cape Fear River Watch, not only does the Cape Fear River Basin have the highest density of CAFO’s of any place on planet Ear th, but in Nor th Carolina alone there are 170 CAFO’s located within the 100-year floodplain. Many more were constructed in the so-called 1,000-year and 500-year flood plains that were both breached in separate weather events over the last two years. Dana Sargent of Cape Fear River Watch said it best, “While industrial pollution has been seeping into our waterways for

years, Hurricane Florence shined a dramatic, national spotlight on how industry, left unchecked, devastates our water quality, and with it, our environment, our economy, our public health and our way of life.” Concentrated animal waste is highly toxic, so there are limits to the amount of animal waste that can be sprayed onto crop fields over time. The excess is stored in unlined open cesspools called “manure lagoons” that receive little to no oversight. The NC Depar tment of Environmental Quality (DEQ) checks facilities once per year by reviewing logs, self-repor ted by the industry producer, who is contracted to manage the waste by the large industrial companies like Prestige Farms or Smithfield Foods.

Smithfield Foods is the largest pork producer in the world and owns much of the hogs in Nor th Carolina. One of their major packaging plants is located right along the banks of the Cape Fear River where they slaughter around 30,000 hogs every day. In 2013, a Chinese company, WH Group, bought Smithfield for nearly $5 billion and has developed a scheme of polluting our environment and shipping the pork overseas. Not long ago there was an ar ticle in Rolling Stone titled, “Why is China Treating NC Like the Developing World?” WH Group said in its 2017 annual financial statement that its American operations account for about 60% of its overall revenue and close to half its profits. The CAFO operations are typically situated in low-income, minority neighborhoods along the floodplain taking advantage of cheap proper ty value and a relative inability of low-income homeowners to push back on the degenerative farming methods being practized. This isn’t by

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ANIMAL AGRICULTURE

accident, there is a strong lobby towards the NC legislature for these farms to continue to take economic advantage of the citizens of North Carolina, but the tides are turning.

“They know there’s a fix. They willfully choose to do nothing about it. We’ve been treating waste as a society for hundreds of years. There are superior technologies.”

For the first time, in 2018 Smithfield lost three hog nuisance cases where plaintiffs argued that their quality of life was hindered due to odors from neighboring CAFO’s. The most recent lawsuit was for over $470 million, and there are many behind it. As published in the Washington Times, Michael Kaeske, a Dallas, Texas-based lawyer representing the citizens burdened by the industrial farms, told jurors, “They (industry) know there’s a problem. They know there’s a fix. They willfully choose to do nothing about it. We’ve been treating waste as a society for hundreds of years. There are superior technologies.”

Smithfield’s response has been to publish a statement that they intend to follow the lead of states like Missouri and cap manure lagoons to limit airborne environmental exposure and capture the methane produced as a source of energy. While this sounds like a welcome step forward, it does not address the problem of managing the actual animal waste. Are we merely going to contain the problem and continue to distribute it raw into the environment? The CAFO farming model was born in the United States but is now spreading around the globe. Reports of CAFO’s in Asia and Australia are now common. Nearly every county in England has at least one industrial-scale livestock farm, with an estimated 800 US-style mega-farms operating across the UK. The headline of an article in The Guardian said it best - “Rise of mega farms: how the US model of intensive farming is invading the world”. The real solution is to diversify and change our agriculture to more regenerative practices, but there are stop-gap solutions

that can upcycle the problem even without adopting more conscious and progressive agricultural methods. One method that I am working on locally is seeding microbe packages into biochar and creating simple biofilters to mitigate the problem at the source. The quality of biochar is critical, but we have already generated data to prove that it can handle the scale of the problem if implemented correctly.

As is often the case in the agricultural space, these sorts of solutions, no matter how obvious they may seem to test and implement, involve a change in mindset and a measured and truly holistic approach. While this may be a challenging landscape for hungry human populations and an entrenched global industry to navigate, the key is a healthy incentive. The greatest tool we have to change agriculture for the better is transparency and buying power, as Big Ag can only afford to pollute the public if we continue to eat what they grow. Food for thought! 3

Evan Folds is a regenerative agricultural consultant with a background across every facet of the farming and gardening spectrum. He has founded and operated many businesses over the years - including a retail hydroponics store he operated for over 14 years, a wholesale company that formulated beyond organic products and vortex-style compost tea brewers, an organic lawn care company, and a commercial organic wheatgrass growing operation.

Bio

He now works as a consultant in his new project Be Agriculture where he helps new and seasoned growers take their agronomy to the next level. What we think, we grow! Contact Evan at www.BeAgriculture.com or on Facebook and Instagram @beagriculture 39

GROWING PROJECTS

s ’ o Whowing at h Gr W Where 1.

USA

& Canada

London, ON

Mushroom Magic

Credit: Shogan Maitake

A Canadian company is introducing a Japanese delicacy to North Americans in a very big way. Shogan Maitake has a 10,000 sq ft stateof-the-art hydroponic facility where about 1,300 pounds of Maitake mushrooms are produced every day. The technology used has made the factory feel much like the mountains of northeastern Japan, which is the natural growing environment for the mushrooms. Free of all chemicals and pesticides, these Maitakes have a bold flavor and feathery texture; they grow quite large so can be cooked like a steak on the grill, or chopped up and added to dishes such as risotto, pasta, and even eggs. The benefits associated with eating them are said to be plentiful. CEO Yoshinobu Odaira has partnered with many research teams to study the idea of using compounds from the Maitake mushroom to help with various health problems, such as cancer. Food that heals… Learn more: shogunmaitake.com

Ossipee, NH

Building the local food economy is at the very core of Pork Hill Farm. It all began in 2009 on a leased acre of land; fast forward 10 years, and Paul Swegel and Katie Doyle Smith have expanded to grow certified organic flowers and produce on seven acres of land spread across six different fields in scenic New Hampshire’s Water Village. Always working with the seasons, the farm grows a wide variety of fruits and vegetables ranging from heirloom tomatoes, zucchinis, and peppers, to greens such as arugula. An abundance of organic flowers bloom from spring to fall, and customers have the opportunity to pick them to create their own floral arrangements. Pork Hill Farm believes in community supported agriculture (CSA), and invites the community to become members so they can buy the freshest produce not usually found at supermarkets directly from the farm. Members are also invited to help strengthen the local food economy by volunteering or signing up for a work-share program. Creating healthy food and lifestyle options for the locals… Learn more: porkhillfarm.com

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Brijette Peña had quite the vision when she dreamt up the San Diego Seed Company. She realized regionally adapted seeds for Southern California climates were few and far between and wanted to change that for good. Her urban seed company offers gardeners and farmers organic, heirloom seed varieties that are genetically diverse and thrive in the area’s many microclimates. With the gardener’s success in mind, companion flowers are also sold to grow alongside the produce and naturally keep the critters at bay. The company is very passionate about promoting ethical and local seed production; by producing seeds in the climate in which they are meant to be grown, crops will flourish. The San Diego Seed Company says it’s been able to sustainably create drought-tolerant varieties that are also extremely resistant to pests and disease. Adapting to the local conditions… Learn more: sandiegoseedcompany.com

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Philadelphia, PA

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Working on the Railroad Three miles of unused rail lines are being transformed into lush, green public gardens in the heart of Philadelphia. The non-profit Friends of the Rail Park has been working tirelessly with the city and other groups to bring the project to life. Phase one is now complete, allowing visitors and their pets to follow winding pathways through about ¼ mile of vegetation while also enjoying scenic city views from one of the many bench swings. Much of the rail yard’s existing infrastructure has been incorporated into the design through the park’s various seating options, platforms, and guardrails. The plan is to eventually have the green space connect 10 different neighborhoods and 50 city blocks. If successful, the Rail Park will be twice the length and twice the width of New York City’s High Line and will include pedestrian walkways, dedicated bicycle paths, and a public meeting space for the people of Philadelphia. More funds and a lot more work is needed to make that a reality. Creating a better quality of life… Learn more: therailpark.org

BY ALBERT MONDOR, HORTICULTURIST AND BIOLOGIST

the

climate

controlled

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Itâ&#x20AC;&#x2122;s possible to start the growing season earlier and extend the harvest period by a few weeks

lthough 16 of the last 17 years are considered to have been the warmest since climate data was made available, the fact remains that winters in Canada and the northern United States are harsh.

This reality forces urban farmers to start their season only once the snow melts and the ground thaws. Also, most edible plants that are grown outdoors stop producing and die with the arrival of autumn frosts. However, with some simple and effective protection techniques, it is possible to start the growing season earlier and extend the harvest period by a few weeks.

CLIMATE CONTROLLED GARDEN

Agrotextiles Agrotextiles are white, veil-like, textiles used primarily to protect crops against insects and bird attacks while also allowing the sunlight to reach the plants for photosynthesis. Some agrotextiles are insulating and help maintain a temperature of about 5 째C (41째F) more than the ambient air. For example, at an outside temperature of -4 째C (25째F), plants covered by an agrotextile are not affected by frost. In the northeastern United States and southeastern Canada, the use of agrotextiles makes it possible to seed or plant certain vegetables by the end of March or the beginning of April. It also can extend the growing season until December in some areas.

In addition to being protected from the cold during spring nights, cucumbers planted under a small shelter covered with an agrotextile are not affected by the striped cucumber beetle, a vector of various diseases. With this technique, the harvest of cucumbers can be extended until the end of summer, sometimes even until the beginning of autumn.

CLIMATE CONTROLLED GARDEN

By covering a plot of ground with an agrotextile, it is possible to sow or plant leafy vegetables, such as lettuce, kale or spinach, as the winter ends. Since the ground is often not completely thawed at this time of the year, this technique gives better results if you grow your edibles in a tub or a gardening table, with new substrate, installed in a sunny place.

Do not forget to cover your cold frame with straw or a thick blanket when nighttime temperatures start to dip

Agrotextiles can also be very useful in the spring to protect tropical vegetables such as tomatoes and peppers planted before the last frost. There are many ways to cover edible plants with agrotextiles, but the easiest method is to place it on metal or plastic hoops. Flexible plastic tubing usually does a good job.

A cold layer is relatively easy to build, but it is best to make it with a rotproof material such as composite wood or steel. If you opt for wood, use cedar, oak or torrefied larch, which are known for their resistance to rot.

A gardening table covered with an agrotextile makes it possible to start the urban agriculture season by the end of March and extend it until December.

Cold Frame Another useful technique for extending the outdoor urban agriculture season is the use of a cold frame. It is a structure made of wood, composite wood or metal, 30 to 50 cm (12â&#x20AC;? to 20â&#x20AC;?) high, without a bottom, and can be fixed or transportable. The frame is covered with a window or any other transparent plastic material (polycarbonate, corrugated polypropylene (coroplast), etc.). It is best to install the window or cover material at an angle and make it south facing. The cold frame can be built in several sections, which are superimposed according to the height of the cultivated plants. In sunny weather and when the temperature is hot, it is essential to open the cold frame to allow aeration, and thus avoid condensation and a crop

of cooked vegetables! In the evening, you have to close the window completely. Do not forget to cover your cold frame with straw or a thick blanket when nighttime temperatures start to dip. This type of shelter makes it possible to start the gardening season four to six weeks earlier, in March or in April. However, as the soil is usually not thawed at this time of the season, rather than growing vegetables in the ground, it is best to grow them in textile pots (Smart pots) placed in the cold frame. This technique also extends the harvest period until the end of December or early January in some northern areas. The period of use of a cold frame can be extended by a few more weeks if you properly insulate the sideboards and install a heating cable on the ground. However, the cold frame should be reserved for growing Brassicaceae plants, such as cabbages and kales, as well as root vegetables like beets and carrots, and leafy greens adapted to cool climates.

CLIMATE CONTROLLED GARDEN

A greenhouse is a great way to practice urban agriculture twelve months a year but could be expensive to heat.

Mini-greenhouse Of all the techniques, greenhouse cultivation is undoubtedly the one that is most effective for those looking to start the outdoor gardening season earlier. One method is to use a tunnel covered with a plastic film. The tunnel should be made of a thin transparent polyethylene membrane installed on metal or plastic hoops (flexible plastic hose usually does the job) firmly attached to the ground or the sideboards of the tub. Vegetables like carrots, kale, leeks or onions can be planted in August, covered with a tunnel in the middle of fall and then harvested in winter or, in some cases, the following spring. These plants can also be seeded or planted under a tunnel in March or April and then harvested in spring or early summer. The polyethylene film lets in sunlight and keeps enough heat at night for some edible plants to grow even if it’s cold outside. The earth absorbs heat during the day and re-emits it during the night in the form of infrared radiation, helping to keep the air under the plastic film hot enough for the plants. Also, since there is virtually no evaporation, the soil remains wet permanently. Even though this technique requires very little intervention, it is vital to use a lot of compost during planting.

Although the snow accumulated on the sides of the tunnel is an excellent insulating material, it may sometimes be necessary to cover the ground at the base of the vegetables with a mulch made of shredded leaves or straw to create a second insulating barrier during the cold periods of winter. You can also install a heating cable at ground level. A second technique is to build a more elaborate greenhouse that will be heated using an electrical system. By keeping the temperature slightly above the freezing point, at about 5°C (41°F), you can expect to grow most leafy vegetables such as Swiss chard, lettuce, and arugula. If the greenhouse is not heated, however, it becomes challenging, if not impossible, to grow tomatoes and cucumbers during the winter months. In this particular case, it is often more profitable and economical to cultivate edible plants of tropical origin under artificial lighting inside a well-insulated building. 3

BIO Passionate about environmental horticulture, urban agriculture and extreme landscape design, Albert Mondor has practiced his craft for over 30 years and created numerous gardens in North America. In addition to teaching courses and lecturing at conferences across Canada, his weekly gardening column has appeared in the Journal de Montréal and the Journal de Québec since 1999. In April 2018, Albert Mondor has published Le nouveau potager, his tenth horticultural book. He is a regular guest and contributor to radio and television programs and his hosting The Trendy Gardener spots broadcasted on Météo Média and online. You can also read his blog called Extreme Horticulture at albertmondor.com. Follow Albert on Facebook: fb.com/albert.mondor 49

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BY ANDREW ABRAMSON

TRUMP

IN DENIAL

CLIMATE CHANGE

n a Friday in late November, when Americans were shopping for presents and indulging in Thanksgiving leftovers, the Trump Administration quietly released a damning climate change report. It’s no coincidence this 1,600-page report — which made clear “Earth’s climate is now changing faster than

at any point in the history of modern civilization, primarily as a result of human activities” — was released on a holiday weekend. The anti-science, climate change denying Trump Administration was forced by law to release the study but hoped few would notice it. Fortunately, in the age of cell phones and news alerts, they couldn’t bury the news. If anything, “Black Friday” was a fitting day for the government to reveal what most of us already know: climate change will have a devastating impact on the entire planet, and we’re only making it worse by the day.

Somehow, climate change has morphed into one of the most politicized issues in the United States

Climate change is the world’s most pressing issue, and it should be immune from politics. We can disagree on the best way to administer healthcare to our fellow countrymen and at what rate to pay taxes, but we all need to breathe clean air and protect our food and water supply. Somehow, climate change has morphed into one of the most politicized issues in the United States. This began long before Trump. But climate change denial has become an alarming reality since Trump took office and his actions could set climate initiatives back decades. There might be no turning back. The GOP is funded by Big Coal and Big Oil, two industries that must make significant concessions to save the planet. That won’t happen voluntarily. “I don’t believe it,” Trump said of the report’s central conclusion that global warming is causing ongoing and lasting economic damage.

If you’re wondering why Trump would even release a report that goes against his repeated claims that climate change is a Chinese hoax, understand that it’s a federally mandated study dating back to the George H.W. Bush Administration. In 1989, the U.S. Global Change Research Program was established by a Presidential Initiative from Poppy Bush. A year later, Congress passed the Global Change Research Act of 1990 which required the council to release an assessment at least every four years on the effects of global change.

At the time, it wasn’t the least bit controversial. In an era when Congress wasn’t packed with conservative Climate Change Deniers, the Senate passed the Global Change Research Act 100-0. Fritz Hollings, a conservative “Southern Democrat” of the 1980s, said at the time “the problem we face is potentially enormous. Global warming could radically change world climate and world agriculture.” Fast forward nearly 30 years, and the latest report was due to be released in December. The Trump Administration inexplicably released the document early to minimize its findings. So what was in there that Trump was so quick to deny? Here are some of the highlights:

Considering Trump doesn’t read his administration’s own intelligence reports and appears to have little knowledge of most of America’s domestic and international issues, there’s zero chance he has an even basic understanding of climate change. By saying he doesn’t believe his own administration’s report, Trump is actually saying he doesn’t want to believe it. Why should Trump, a man who cares about nobody but himself, give any thought to a crumbling planet? He’ll be dead when the impact of climate change is truly felt. His descendants, if not imprisoned, will have the funds to live in an Oxygenated Zone along with other Trust Fund elites.

The quality and quantity of water available for use by people and ecosystems across the country are being affected by climate change, increasing risks and costs to agriculture, energy production, industry, recreation, and the environment. Impacts from climate change on extreme weather and climaterelated events, air quality, and the transmission of disease through insects and pests, food, and water increasingly threaten the health and well-being of the American people, particularly populations that are already vulnerable. 53

CLIMATE CHANGE

Without adaptation, climate change will continue to degrade infrastructure performance over the rest of the century, with the potential for cascading impacts that threaten our economy, national security, essential services, and health and well-being.

Rising temperatures, extreme heat, drought, wildfire on rangelands, and heavy downpours are expected to increasingly disrupt agricultural productivity in the United States. Expected increases in challenges to livestock health, declines in crop yields and quality, and changes in extreme events in the United States and abroad threaten rural livelihoods, sustainable food security, and price stability.

To downplay a report that the government has spent years researching, White House Press Secretary Sarah Sanders attacked its methodology

Our Nation’s aging and deteriorating infrastructure is further stressed by increases in heavy precipitation events, coastal flooding, heat, wildfires, and other extreme events, as well as changes to average precipitation and temperature. Without adaptation, climate change will continue to degrade infrastructure performance over the rest of the century, with the potential for cascading impacts that threaten our economy, national security, essential services, and health and well-being. Even in a future with lower greenhouse gas emissions, many communities are expected to suffer financial impacts as chronic high-tide flooding leads to higher costs and lower property values. Outdoor recreation, tourist economies, and quality of life are reliant on benefits provided by our natural environment that will be degraded by the impacts of climate change in many ways. Trump views environmental policy with the same disdain as healthcare reform. That’s why this report terrifies him. While he promises a booming economy, high real estate values, and an improved infrastructure system, the government believes much of that is at risk of collapsing from climate change. To downplay a report that the government has spent years researching, White House Press Secretary Sarah Sanders attacked its methodology. She said the report is “not based on facts” but instead “is based on the most extreme modeled scenario, which contradicts long-established trends.”

In typical Trumpian fashion, Sanders was wrong. Katharine Hayhoe, one of the report’s authors, set the record straight on Twitter. She said the report wasn’t based on the most extreme circumstance and that the study considered a very broad range of scenarios. “Over the last century, tho, it’s important to recognize that climate models — even the super-basic ones from a decade ago — do a darn good job of reproducing observed changes,” Hayhoe tweeted.

Yes, the climate is changing for the worse, and it’s a manmade calamity. The record wildfires in Californias and super hurricanes across the Atlantic are happening for a reason. But as long as Trump is in office, expect the United States to do next to nothing to address the problem from an executive level. At the Legislative level, Democrats regained control of the House and are establishing a committee that will work on solutions to combat climate change. Peter DeFazio, an Oregon Democrat and the new House Transportation and Infrastructure Committee Chairman, called climate change “the existential threat to the future of the planet. I don’t think we can have too many members actively involved.” Leave it to a Trump ally to follow up that grown-up statement with the dumbest argument yet on climate change. Steve Milloy, a lobbyist for Big Oil, said DeFazio’s “existential threat’ comment was “insanity.” “For comparison, the atmosphere Venus is 96.5% CO2 — and the planet is still there. In contrast, Earth’s atmosphere is only ~0.04% CO2,” Milloy tweeted. So climate change is not an existential threat because Venus exists? These are the people running and advising the United States government. We should all be terrified. 3

Follow Andrew Abramson on Twitter @AbramsonFL

BY TOM FORREST, STEALTH GARDEN SUPPLIES

Stealth Science

Plant Food R

ecent scientific breakthroughs have taught us a great deal about how our floral friends find nourishment; however, it is

still very open to discussion and there is much to

This five-part series delves into plant science to help you understand why a garden flourishes or flops. Over the next five issues, we will discuss the important topics relating to plant biology and physiology, structure and function, covering roots to shoots and everything in between!

learn in this field (pun intended). This is our third Stealth Science lesson, and we will explore the role of plant food and ionic relations (sounds sexy, right?) to understand better the most economical and sustainable ways to fer tilize our fields.

The role of beneficial bacteria and their symbiotic relationship with plants is only barely understood by modern science. We are only just scratching the surface for the best methods to cultivate crops to maximize both sustainability and productivity, while simultaneously caring for our natural environment and other living organisms. Water culture experiments in the 19th century found that plants required 16 ‘essential elements’ for growth. These were determined as essential if, in its absence, a plant could not complete its life cycle. It was accepted that carbon, hydrogen, and oxygen are sourced from the air and water, while the remaining mineral nutrients were sourced from the soil. An eminent German chemist named Justus von Liebig proposed that plants grew in direct proportion to their supply of nutrients and that a deficiency of any one element prevented growth.

Justus von Liebig “minimum law” illustrated by liquid in a barrel which can only rise as high as the shortest stave. 56

Understanding the science behind the art of horticulture ensures we can cultivate beautiful, healthier, and more sustainable crops. The Five Classes: • Plant Morphology and Anatomy (see last issue) • Water Interactions • Plant Food and Ionic Relations • Photosynthesis and Phloem • Plant Hormones: The control of growth and development

An eminent German chemist named Justus von Liebig proposed that plants grew in direct proportion to their supply of nutrients and that a deficiency of any one element prevented growth This was codified as his ‘Law of the Minimums’ and is commonly found in most modern agricultural textbooks as a useful barrel graphic. Our current scientific understanding states that there are distinct ‘macro’ and ‘trace’ elements, and the category is determined by the required amount of each element for growth. Macronutrients include nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), silicon (Si), sulfur (S) and iron (Fe). Trace elements include boron (B), chlorine (Cl), copper (Cu), molybdenum (Mo) and zinc (Zn). With inadequate or toxic amounts of these mineral elements, a plant will demonstrate chlorosis or necrosis symptoms. Chlorosis is a yellow coloring due to a lack of chlorophyll and necrosis is the death of specific parts or the entire plant.

STEALTH SCIENCE

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Just like us, plants require a mixed diet of nutrition in different forms. They will survive on adequate food but will thrive on a wholesome diet with a comfortable environment It is challenging for home or even professional growers to isolate specific deficiencies or toxicities in plant nutrition, as many symptoms are very similar or are a result of many different imbalances. For example, iron, nitrogen, potassium, sulfur and magnesium deficiency can all cause chlorosis in leaves, but combinations or toxicities may have almost the opposite effect. Pest and disease issues can also demonstrate similar symptoms to nutrient deficiencies, meaning a holistic approach to problemsolving is always best.

Stealth Science

Plant Food and Ionic Relations

Generally, hydroponic grow mediums can be flushed or water reservoirs emptied and re-filled as a first step to remedy a deficiency. There are organic (enzymatic) methods of cleaning a substrate, or a variety of natural and synthetic chemicals can be used (citric acids, hydrogen peroxides etc.). In principle, it should be easy to diagnose mineral deficiencies through key symptoms and cure them by adding limiting nutrients (fertilizers). However, there are two significant problems: the effect of the soil (substrate) and the plant responsiveness. Indirect impacts of nutrient imbalances can cause further toxicities, and some elements may partially replace others, but not fully replicate their essential function. For example, a Ca2+ rich solution would be antagonistic to K+ entry, and the K+ deficiency symptoms would not be relieved by merely adding more K+ as the Ca2+ is still in excess. The Cation Exchange Capacity (CEC) describes the capacity of a substrate to hold onto exchangeable cations (imagine chunks of food). Sand has an extremely low CEC, but clays and humus based soils have a much higher CEC. The CEC is an inherent soil characteristic and can be hard to change significantly. It determines the substrateâ&#x20AC;&#x2122;s ability to hold onto essential nutrients and provides a buffer against acidification. Organic matter needs to be added and amended regularly to improve the CEC of soil. It depends if you are growing in soil or soil-less substrates (coco, Rockwool etc.) as to the best path for your crop nutrition. Soil blends can contain all necessary nutriment for growth but can be extremely difficult to maintain and sustain in small pots. â&#x20AC;&#x2DC;No-Tillâ&#x20AC;&#x2122; Living soils and compost tea blends are gaining popularity as economical ways to cultivate crops, but the preparations and extensive required resources must be taken into account. 59

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Soil-less mixes generally require mineral nutrient for best plant performance. Organic soil-less mixes such as coco coir can utilize the benefits of organic nutriment and beneficial organisms in combination with mineral nutrition. Most commercial hydroponics brands include a combination approach of crop fertigation, using sea kelp, guano, and other organic blends alongside chelated mineral nutriment. For our gardens outside, most Australian soils are intrinsically old and low in nutrients. In traditional commercial cultivation, we add fertilizers to increase the mineral nutrition for crop growth as our land has been dangerously depleted. Initially, only organic fertilizers were known (manures and seaweed), and these were heaped and left to decay before planting (otherwise it would ‘burn’ the plants). Once mineral nutrition was discovered, inorganic (mineral) fertilizers were relied upon to supply the growing demand for food crops. Nitrogen and phosphorus were the most common limiting factors and are most often applied in fertilizers. Over time, we can build up the correct ratios of organic matter into soils and improve their quality, but modern commercial farming has done significant (potentially irreparable) damage to our farmable land. Pesticides, fungicides, herbicides and excess mineral nutrition all cause harm to the naturally occurring beneficial organisms within the soil. Without these organisms and fungus, our natural ecosystem would fail to exist. But if we achieve the correct balance of nutrition, predominantly in the NPK ratio, we can reduce any limiting factors for growth. We need to aim to match the plant potential to the availability and solubility of limiting factors from fertilizers. Some commonly known plants have impressive powers to ‘fix’ nitrogen from the atmosphere and collect it in the soil. Legumes allow ‘rhizobia’ bacteria inside their root nodules to store the atmospheric nitrogen. There is a symbiotic exchange of amino acids, sugars, and minerals between the bacteria and the plant host.

Clovers and other such rhizobial legumes are cultivated and chopped back into the soil, releasing nitrogen that will break down for future crops to consume Clovers and other such rhizobial legumes are cultivated and chopped back into the soil, releasing nitrogen that will break down for future crops to consume. There is extensive use of legumes as cover crops in certain sectors of commercial agriculture. The phosphorus cycle in natural systems explains the effective solubilization of phosphorus from soil particles. Symbiotic bacteria and fungi around plants (mycorrhizae) allow for the increased penetration of soil particles by fine hyphae, a superfine underground web of fungus ‘roots.’ This encourages the uptake of soluble phosphate for the plant. Ectomycorrhizal fungi are the external hyphae that interact with the sheath around the root hair, while endomycorrhizal are internal hyphae. Various bacteria also help to break down compounds into absorbable forms for the plant while the acidity/alkalinity of the soil is also a significant influence on these processes. The pH affects the development of beneficial bacteria and even the ability of certain compounds to chemically bind to other particles, making it more difficult for the plant to absorb. Just like us, plants require a mixed diet of nutrition in different forms. They will survive on adequate food but will thrive on a wholesome diet with a comfortable environment. It’s always better to source your fertilizers from recognized sources to ensure the quality and purity or investigate making your living soils at home if you’ve got the space and resources. Once our floral friends have consumed their daily diet, they need to digest it. So how do the plants turn these chunks of food into usable energy? In the next feature of ‘Stealth Science,’ we will investigate the phenomenon of photosynthesis and the phloem, the most influential piece of the plant growth puzzle! 3

BIO Founder of Indicated Technology Pty Ltd, Tom is a certified horticulturalist and paid consultant working in the Australian medical cannabis industry. After finishing studies in production horticulture (hydroponics) and plant biology; Tom has spent the past 6 years working in the protected cropping space. Tom is passionate about sustainable yet economic cultivation methodologies and also teaches cannabis cultivation as part of university and private education programs. Tom is also the Communications Manager for Stealth Garden wholesale supplies. 61

BY DR CALLIE SEAMAN

W hen t he cel l s c ol l a p se, t heir t is s ue s die, of t en op ening t he door t o dise a se in t he f or m of f ungu s/ b ac t eri a or o t her v iruse s in t he p l a n t

Biochemis t ry of t he Cold

LOW TEMP BIOCHEMISTRY

F rom sl ow a nd s t un t ed grow t h t o f eebl e germin at ion r at e s, chl oro sis, a nd w ilt ing, c ol d s t re s s c a n e v en t ua l ly l e a d t o necro sis

ith winter here, temperatures are plummeting, and our plants are taking notice! From slow and stunted growth to feeble germination rates, chlorosis (yellowing of the leaves), and wilting, cold stress can eventually lead to necrosis (cell death). But as with all living organisms, evolution is inevitable, and plants adapt to survive

the icy conditions. Survival techniques are displayed in the form of cellular architecture, water content, gene regulation, the reprogramming of gene expression, a hormonal response, and the alteration of metabolic pathways.

Cold acclimation and acquired freezing tolerance have been extensively studied in winter cereals and Arabidopsis. In general, it has been found that reactions slow as the air cools and that each one has its optimal temperature. The same is true for many metabolic processes within plants, as well as cell division and reproduction. All of these processes slow down and take longer to achieve when the ambient temperature is lower, therefore, reducing a plant’s productivity.

Plants more tolerant to cold conditions have a much lower water content, such as spruce trees, spinach, and winter wheat

Cold stress has two stages. The first is classified as chilling, occurring when the temperature drops to between 0°C-15°C (32°F-59°F). The other stage, called freezing stress, occurs when it’s colder than 0°C (32°F). As water freezes, the molecules form a uniform structure, and rigid crystals start to develop (figure 1). The distance between water molecules grows farther apart, resulting in expansion and solidification.

More than 60% of a plant is made up of water, and it can not produce antifreeze as animals can, so this expansion and crystal formation can be problematic, often resulting in irreversible damage as membranes split. When the cells collapse, their tissues die, often opening the door to disease in the form of fungus/bacteria or other viruses in the plant.

Figure 1: The three structure of water as a solid (<0°C or <32°F), liquid (>0°C or >32°F) and gas (>100°C or >212°F) When temperatures are warmer (0°C-3°C or 32°F-37.5°F), the extracellular water is affected first (Figure 2). Salt/ion concentrations in the cytosol of the cells are much higher, and therefore, reduce the freezing point of the interior of the cell. However, at extremely low temperatures (<0 °C or <32°F), the cell content freezes, eventually causing it to explode. Plants with high water content are more likely to suffer from cold damage at warmer temperatures, one of the evolutionary mechanisms they use to adapt to the cold. Plants more tolerant to cold conditions have a much lower water content, such as spruce trees, spinach, and winter wheat.

#FERTILZERFORTHEFUTURE

Figure 2: Extracellular water freezing in plants

Another alteration to the structure includes membrane modification and cell wall modification. An increase in the unsaturation of the lipid composition of the membranes and cell walls occurs to help prevent the puncher of the cells by ice crystals that form in the extracellular spaces (figure 2). This also helps with the stability of the membrane. Now that we know what happens to a plant at the cellular level, what happens at the molecular level? Studies have found that plants with greater tolerance to the cold have higher levels of unsaturated fat. While linolenic acid often increases after exposure to cold stress, palmitic acid was found to decrease within the plant. The situation is reversed in plants that are sensitive to the cold. For example, cold tolerant tomatoes that overexpress a par ticular gene (Sl ICE1, ironically!) also have elevated levels of several amino acids, amines, and sugars. All these factors lead to more antioxidant activity, thus increasing cold tolerance. In cucumbers, the same gene increases cold tolerance through osmotic regulation by enhancing the accumulation of soluble sugars and the amino acid proline in the tissue. But how do they sense that there is a temperature drop to upregulate gene expression and downregulate others for sur vival? The identification of plant temperature sensors has not yet been achieved, however, some hypotheses exist including the involvement of multiple primary sensors, changes in the fluidity and other physical proper ties of the membranes. We do know that there is a complex, interactive relationship between many different pathways, which results in the regulation of cold acclimation in plants. There are so many factors that contribute to a plant being tolerant to the cold; too many to count!

LOW TEMP BIOCHEMISTRY

Bu t how do t he y sense t h at t here is a t emp er at ure drop t o up regul at e gene e x p re s sion a nd dow nregul at e o t her s f or s urv i va l?

The ability to absorb light is not affected, but there is an imbalance in the consuming of the energy harvested, and a chain reaction begins

When a plant is exposed to frigid temperatures, there is a rapid increase in cytosolic (the gooey bit inside the cell that the organelles float around in) calcium concentration. This calcium increase is caused by the stiffening of the cell membrane, which in turn induces the expression of cold response genes (COR) within the plant. Calcium is responsible for the regulation of many genes within plants. This cold stress-induced calcium signature in the cytosol triggers many different pathways linked with cold tolerance, including the production of cold response proteins (COR). Another theory of how plants sense the cold is via the chloroplasts (where photosynthesis occurs). Chloroplasts are the organelles that contain chlorophyll and are responsible for har vesting the energy from light. A drop in temperature causes a reduction in reaction speed, par ticularly those that involve enzymes. The ability to absorb light is not affected, but there is an imbalance in the consuming of the energy har vested, and a chain reaction begins. Essentially, the energy is not being conver ted quickly enough into a form the plant can use, resulting in the downregulation of the capacity for the plant to har vest light. This process is known as photoinhibition, a topic wor th an entire ar ticle to itself. In consequence, the plant produces reactive oxygen species (ROS), which star t to destroy the cells from the inside. Acting as a secondary messenger to the plant, they let the plant know it is getting colder and to react appropriately! The only thing we have not touched on yet is the effect on phytohormones, those ever stimulating organic molecules that not only confuse us but make the plant do the strang-

est of things. Cold stress is no exception to affecting the balance of hormones, including gibberellic acid, abscisic acid (ABA), salicylic acid, ethylene, and auxins. These effects can be both positive and negative, with external application helping to enhance cold tolerance in some plant species. This is par ticularly true of salicylic acid when an accumulation of free endogenous form in the shoots of chilled grape berry and Arabidopsis. It has been well documented that treating plants such as rice, maize, potatoes, and wheat with salicylic acid helps to increase cold tolerance. This should be minimal and at low concentrations, as growth delays can occur if treatment is continuous. The natural release of this hormone in a cold-stressed plant strongly suppor ts that it is par t of the signaling process. The architecture of the plant is key to its sur vival and adaptation to cold climates. Dwar fism does not occur by accident in many cold tolerant varieties. When it is cold, gibberellic acid and auxins responsible for cell elongation are found to be reduced in cer tain types of wheat, and therefore, the plants remain small. Just like us, plants must evolve, adjust, and adapt to colder climates. And just like us, they may be looking for ward to the warmer days ahead. Until next time, keep growing! 3

BIO Dr. Callie Seaman is a plant obsessed Formulation Chemist

at AquaLabs â&#x20AC;&#x201C; the company behind SHOGUN Fertilisers and the Silver Bullet plant health range. She has been in the hydro industry for 15 years in research development and manufacturing and had previously worked on the VitaLink range. She has a PhD in fertiliser chemistry and a BSc (HONS) in Biomedical sciences and loves nothing more than applying this knowledge to pushing the boundaries of nutrient performance. 65

BY RICH HAMILTON

ripening

ICE RIPENING

I t ’s p er f or med by r a p idly a nd dr a m at ic a l ly reducing t he t emp er at ur e of t he p l a n t ’s nu t rien t f eed t o a s cl o se t o f ree zing a s p o s sibl e

hether you’re growing two plants or 200, you want them all to be at an optimum level of quality, ripeness, and flavor come

harvest time. So, what do you do when your crop doesn’t mature at the same rate?

You can, of course, leave them in flower longer, but this isn’t ideal if the majority of your plants have reached maturity. You could also decide to harvest them all at the same time, but you’ll be compromising on quality and will run the risk of having an inconsistent potency of cannabinoids. Some of your less mature plants may also have fewer trichomes, which can affect flavor, the terpene profile, and the overall effect, which is never a good thing.

Some of your less mature p l a n t s m ay a l s o h av e f e w er trichomes, which can affect fl avor, the terpene profile, and the overall effect

“ice bathing” or “shock ripening” only speeds up the ripening process, not the growing process, and is safest when performed in the last week of flower

A lesser-known but extremely effective option is a technique called ice bath ripening. I first heard about it while attending a seminar for large commercial growers at a cannabis industry show. It piqued my interest, and I wasn’t alone judging by the number of questions asked by the other people there. The speakers were explaining how they get the most from their crops with regards to yield and quality, and also how they achieve uniformity on a tight schedule. Some of the large scale growers har vest every week. If ice bath ripening is good enough for the big boys, then it must be wor th a go!

Ice bath ripening is the process of speeding up the ripening process in individual plants that are developing at a slower rate than the rest of the crop. The goal is to help them catch up with the others so you can achieve the best results possible. It’s performed by rapidly and dramatically reducing the temperature of the plant’s nutrient feed to as close to freezing as possible. Cool the feed by adding ice to the growing medium and the container for a shor t period before harvest.

Read on to make sure you do it right. By exposing the plant to colder temperatures, it is tricked into thinking winter has arrived and that it is dying. As a result, the plant bulks up on trichomes and resin, thus inducing more vibrant colors to protect itself from the change in environment. It is recommended to per form the ice shocking technique in the last week of flower and right up until you begin your flush. By the last week of flower, you should be able to quickly identify any plants that are not as mature as the majority of the pack.

But will the cold damage the plants, also affecting the humidity and temperature levels inside the grow tent? The shor t answer is yes, it will, but only if the plants are exposed to the cold at the wrong time or for too long of a period. That’s why it is impor tant to remember that “ice bathing” or “shock ripening” only speeds up the ripening process, not the growing process, and is safest when performed in the last week of flower. The effect on the conditions inside your grow room should be minimal, as this process is only performed on an isolated few plants of the crop. It may seem like a lot of extra work, but trust me, the additional stress at such a late stage will force your plants to concentrate their efforts on fruit production and ripening. There are a couple of ways to perform this technique, depending on whether you are feeding via a tank, reservoir, or by hand. First, make sure that the majority of your crop is approaching its peak ripeness. A good indication is when the trichomes

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ICE RIPENING

rip ening The effect on the conditions inside your grow room should be minimal, as this process is only performed on an isolated few plants of the crop on your plants star t turning a milky, translucent white color and begin bending over. Plants are entirely ready for harvest when at least 50% of the trichomes have turned. Some growers prefer a slightly higher percentage, but a safe bet is a minimum of 50%.

Do the ice flushing properly in the last week of flower, and your plants will

Whether feeding from a water tank or not, you can wrap the plant pot with an ice collar to enforce the “freeze.” There are large re-freezable packs you can buy either for use in coolers or to treat spor ts injuries. Just freeze the pack, wrap around the outside of the plant pot, and secure. It’s best to insulate the freezer pack somehow, so the cold is directed towards the root zone of the plant.

If you are feeding your plant from a undoubtedly reach tank or reservoir, lower the temperatheir full potential. ture of your nutrient feed down to nearly freezing. The best way to do this If you’re on a budget, large bags of ice is by adding several ice packs to your bought from the grocery store work feeding tank. The ice packs need to be great too. Be sure to double bag the ice, liquid-tight, as any leaking will dilute your feed and negatively as the last thing you need is a leak in your grow room. The impact your plants. Sealed frozen bottles also work well. ice bags will also need an insulated barrier to focus the freeze Each bottle must be changed as soon as its contents have towards the root zone. A great, cheap option would be a large fully melted. grocery store freezer bag that the ice bag can sit in, or if too large, can be cut to fit correctly. If you are going to be away from your plants for more extended periods, consider swapping the water bottles for Do the ice flushing properly in the last week of flower, and your frozen yogur t which is thicker and will remain frozen longer plants will undoubtedly reach their full potential. What do you than water. It’s cheapest bought in a large container and have to lose? All it can do is improve your yield and quality in then distributed into clean, used water bottles ready for those few underperforming plants. If it’s good enough for the big freezing. As a general rule of thumb, the yogur t-filled bottles commercial growers, then we can all benefit from trying it. I did, will last at least three times longer than frozen water bottles. and it worked for me. 3 If you are hand-feeding, chill the feed in a fridge or cooler set as cold and for as long as possible without actually freezing. Add as many ice bags as possible about a half hour before watering to help temperatures dip.

An industry veteran with over 20 years experience in a variety of roles, Rich Hamilton is currently a business development manager for a large UK hydroponics distributor.The author of Growers Guide book series, Rich also writes on all aspects of indoor gardening, as well as being an independent industry consultant working closely with hydroponic businesses worldwide.

Bio

BY CATHERINE SHERRIFFS

MAJOR BREAKTHROUGHS IN RECYCLING FOOD WASTE The plastic is made of food waste, and so the scientists behind it say the bugs and bot tomfeeders in the water will degrade the objects

RECYCLING FOOD WASTE GardenCultureMagazine.com

Tackling climate change requires that we solve multiple problems; among them, plastic pollution and food waste. There are so many fresh ideas aiming to do precisely that. Find

best of

the blog

this blog and others straight from the garden at GCMag.co

lastic is a problem. So is food waste. A team of researchers from Montreal, Canada has decided to tackle both of these issues at the same time, and the result is pretty impressive. A report by CTV News says the team of experts at McGill University has developed a durable and fully

biodegradable plastic from the leftover shells of shrimp, lobster, and other crustaceans. And if it ends up in the ocean like all of the other plastic we dump there every day? No problem. The plastic is made of food waste, and so the scientists behind it say the bugs and bottom-feeders in the water will degrade the objects. Wow!

Innovative Ideas

It’s a very complicated process. The researchers say they’ve modified chitin, the substance found in the shells, into a polymer called chitosan. The CTV report explains that the chitosan is made with a longer molecular chain, and the longer the chain, the stronger it is.

Around the world, there are many different efforts tackling food waste. A $2 million plant is in the works along Mississippi’s Gulf Coast where the hulls of peeled shrimp, which usually end up in landfills, will be dried and harvested for use in other products.

There’s still work to be done. While the process has been patented, the resulting plastic still has to be made more malleable before it can be sold. Still, the hope is to one day see this new material replace petroleum-based plastics, used for things like straws, disposable cutlery, plastic bags, food packaging, and even 3D printing.

Synthetic plastics can take hundreds of years to break down, but PHAs are said to degrade within one year in the environment and less than ten years in water

Chitin is also found in crickets, so people allergic to things like shrimp and lobster can’t eat the bugs, which are being touted as the protein of the future.

And in Toronto, Canada, a team of scientists at the U of T recently formed Genecis, a company taking wasted food out of landfills and converting it into PHAs, which is a quality, biodegradable form of plastic.

credit: fis.com

I’d be interested to know if this plastic would at all affect people with shellfish allergies. Although they won’t be ingesting the plastics, could residues be left behind on the skin and in various food and drink items?

In Vermont and New Hampshire, a company called White Mountain Biodiesel collects used cooking oil from restaurants and turns it into environmentally-friendly biodiesel fuel, which is non-toxic and easy to use.

Whoâ&#x20AC;&#x2122;s Growing What Where?

See all the urban growers, backyard gardeners, and inspiring communities featured in Whoâ&#x20AC;&#x2122;s Growing What Where over the years.

NEW

visit: GCmag.co/WGWW

RECYCLING FOOD WASTE GardenCultureMagazine.com

The hope is to one day see this new material replace petroleum-based plastics, used for things like straws, disposable cutler y, plastic bags, food packaging, and even 3D printing.

the blog

Carbon cycle of Bioplastics

credit: SlideShare

credit: http://idsnmow.blogspot.com

Chitin bioplastic

best of

Synthetic plastics can take hundreds of years to break down, but PHAs are said to degrade within one year in the environment and less than ten years in water. Not too bad. We should all be doing our part to reduce our food waste at home. Here’s hoping 2019 is a year where innovative projects like these continue to gain steam. It has to happen.

EDITOR’S NOTE: Of course, we strongly encourage people either make their compost at home or contribute to their community programs, but the fact remains that we produce too much of it, and the resulting plant fertilizer isn’t always of excellent quality. The world’s waste problem is a big one, and with innovative ideas like biodegradable plastic, the scientific community is working to find solutions that can work alongside our existing compost initiatives.

Sources: • CTV News: bit.ly/2CfbLvC • US News: bit.ly/2Fs3aZR • White Mountain Biodiesel: bit.ly/2CbK5aQ • University of Toronto: bit.ly/2OWVqAI

BY MATT MOUNTAIN

The PRUNING

debate

Just like us, plants run on a metabolic network, and every living cell in a plant makes demands on that network for food and water that must be balanced 76

THE PRUNING DEBATE

s with most topics in the hor ticultural world, if you ask the internet or a selection of growers for advice on pruning flowering plants, you’ll get different opinions. Even plant scientists will find unexpected results in this area, although, not necessarily surprising.

What the best way to prune for yield? Well, in reality, there are as many answers as there are plant species. A quick online search for the species you have (provided you search for advice from a recognzsed hor ticultural institution) will tell you what time of year or phase of growth is best for pruning. So, why is there still so much debate on this issue? More interestingly, what are the basics we need to know before we star t?

If you prune or remove leaves during flowering, it is possible all of the plant’s resources will go towards flower rather than leaf replacement

If you suspect that this is yet another plant-based debate where the only universally correct answer is “balance,” you are right. Like the hippies say, “in all living things, energy is shared.” Balance isn’t just impor tant: it’s unavoidable. Just like us, plants run on a metabolic network, and every living cell in a plant makes demands on that network for food and water that must be balanced. That process of resource attribution is called par titioning. Have you ever heard someone talk about applying a specific treatment or product to a plant and making it do something? It can sound a bit anthropomorphic. Treat plants a cer tain way, and you can let them know they are going to die. In response, the plants will change their behavior. For example, If you allow lettuce to repeatedly dry and wilt before re-watering and feeding it, it will bolt or go into flower. It is inevitable, no matter how much nitrogen and veg boosting products you supply it. It “thought” it was going to die, and so it put all available resources into reproduction, or flowering and seeding.

the unconscious physical processes regulating our metabolisms and keeping us alive, are complex self-righting mechanisms, where a myriad of interconnected balancing acts tend to push the overall system one way or another depending on circumstances.

Plants have experienced a wide range of situations over their evolutionary history, such as unstable weather and nutrient supply, high pathogen levels, and more. Those that have survived, especially those adapted to non-specialist or varying conditions, have a range of different growth responses available to them. These responses and the flexibility of the resource par titioning system that powers them is what allows us to manipulate plants in so many ways, making them grow and yield differently compared to how they perform in their natural habits. Reproducing is a non-negotiable requirement for existence, and flowering and fruiting are evolved responses to the challenges of doing so effectively over the long term. So, it’s not surprising that more energy is needed if plants are taking a shortcut to flower, devote, or partition. This is where balance and oxygen come back in.

Many scientists and science communicators (myself included on most days) don’t mind this intention-based way of talking about biology, plants, or humans. It comes naturally and is relatable. However, many flat out reject this idea. The problem is it’s not technically true in the sense that plants don’t “know” anything. They, similar to

THE PRUNING DEBATE

Remember oxygen? The thing that keeps your plant’s roots from drowning and rotting? It turns out it’s not just your roots that need that sweet, sweet O2 . We already know that plants make their food through photosynthesis and give out oxygen. Water, sunlight, and air come in, oxygen and food go out. Right?

Well, sor t of. Every cell needs to make energy (food), then burn it with sunlight and unicorn tears. Just like us, to break sugars down and make the molecules that power cellular mechanisms, they need oxygen in every cell. Keeping an oxygenated rootzone isn’t just crucial for plant health in an abstract way. It directly fuels every cell in the organism, and if there isn’t enough, growth will be limited. So, here’s what you need to know: •

• • •

If you grow bushes with ten levels of leaves that end up hiding the flowers under their canopy, you would almost certainly do better with some thinning out

Plants par tition energy resources internally between areas and different activities (roots, leaves, flowers/growing, reproducing, etc.) depending on the circumstance. Plants get energy from the sun through its leaves. They transpor t that energy around internally as sugars. All cells in plants use energy to survive and reproduce (plant growth).

These are the basics of the pruning debate. The reason there is so much confusion, differing opinions and results, is mainly because all the factors at play are interconnected and interdependent. Despite all this apparent complexity, the idea is very straightforward. When a plant is in flower, it allocates a higher percentage of its energy resources to flowering than it does in vegetative growth. So, if you prune or remove leaves during flowering, it is possible all of the plant’s resources will go towards flower rather than leaf replacement. However, go too far with the pruning, and the loss of leaf area will restrict the plant’s ability to make food for growth, which results in fewer flowers and fruit yields. In a nutshell, flowers can be restrained by either having too many leaves or not enough of them.

What is the solution? Balance. One of the most current scientific studies on this subject is a Dutch paper by S Xiao, A. van der Ploeg, M. Bakker and E. Heuvelink that looks at the impact reducing leaves by 30% has on tomato plants. In shor t, they found that lowering leaf numbers can increase resource allocation to the fruit by modest, but commercially significant amounts. In the same paper, a reduction in overall mass was observed, which is to be expected given the plants absorb less energy after pruning. One of the ways the authors compensated for that in tests was to increase planting density, which worked in this case, delivering higher yields. So, should you go out and chop 30% of the leaves off all your plants? Not necessarily. The plants used in this study were optimized, commercial tomatoes, therefore, increasing density after removing leaves was done very accurately. The plants were not overly congested before or after. If you have perfectly-spaced plants with sparse leaf structure, you should not expect a productivity gain from removing one-third of their leaves, or by adding more plants and making the overall density too high.

THE PRUNING DEBATE

Congested plants with inward branches or with very dense canopies block air circulation and can attract pests and disease, so removing them, even during vegetative growth, is essential

On the flipside, if you grow bushes with ten levels of leaves that end up hiding the flowers under their canopy, you would almost cer tainly do better with some thinning out, as well as some extra plants to take advantage of the previously shaded areas. What about the tricky intermediate cases? First of all, one of the main reasons we prune leaves outside of flower production is general plant health and maintenance. Congested plants with inward branches or with very dense canopies block air circulation and can attract pests and disease, so removing them, even during vegetative growth, is essential.

Remember, above all this is a balance.

The same rule applies for yellowing, damaged, and lowdown shaded leaves; remove them. Leaf pruning can only allocate resources to flowering if the plant is in bloom, so tidying up in the vegetative phase will help create a plant that is structurally ready for efficient and healthy flowering. If you apply this philosophy to intermediate plants during flowering, by progressively removing the oldest leaves star ting at the bottom of the plant, you can get the benefits of forced re-allocation to flowers while preempting the leaves the plant will drop anyway as it ages. Remember, above all this is a balance. If you start seeing the ground through the plant, you have gone too far. If you find more than three or so leaves one above another, the ones below can probably be removed, within reason. 3

Bio

Matt Mountain - Clearspeech.london With a Bachelor of Sciences degree and background in management consultancy, Mattâ&#x20AC;&#x2122;s day job is helping everyday people - aka customers, understand and benefit from the developments that researchers and manufacturers in advanced horticulture make every year. Matt manages General Hydroponics Europe and General Organics operations in the UK, and with 20 years of urban gardening experience in France and England, is now particularly concentrated on the practical application of hydroponics in small-scale urban food production with a focus on high value, high carbon cost produce. 81

BY CAROLINE RIVARD

In Between The Rows

Under The Gardenerâ&#x20AC;&#x2122;s Feet

The green rebellion likes to take over what used to be well-organized yards and rows 82

GARDEN WEEDS

s passionate growers, we all hope for beautiful flower beds, productive vegetable gardens, and lush patches of herbs. A place where different

colors, shapes, and sizes blend perfectly in harmony to satisfy our artistic goals.

There is nothing more satisfying than succeeding in bringing the perfect garden to life! But the path to “garden perfection” has some roadblocks, and weeds are a major one. There are so many of them, and they multiply fast and strong! The green rebellion likes to take over what used to be well-organized yards and rows.

How to destroy the enemy? Make some tea!

From making nutritious teas, herbal remedies, and delicious salads, to creating nutrient-rich green manure, the usually despised green intruders are, in fact, precious gems

Instead of feeling disappointment and extreme frustration (why didn’t we see them before they took over the full lot?!), think about viewing the weeds from a different perspective. Don’t just rip them up and throw them into the compost pile; put them to use in other ways throughout the year.

Knowledge is the key: from weeds to treasures

Over the years, the world’s soil has been significantly depleted of its nutrients through the commercial, large-scale modern way of farming. The apparent result is that the food we eat is now less nutritious for our bodies than it was a century ago. Today, we need more than an apple a day to keep the doctor away. But believe it or not, adding some weeds from the garden to your menu can make up for lost nutritional value.

If you have used cow or horse manure to fer tilize your crops, there is an excellent chance that Lamb’s Quar ters (Chenopodium album) grows happily and abundantly in your garden. You probably are already well-acquainted with its closest cousin; spinach! This is one of the most common weeds that grow in gardens. The tender tops, harvested in the spring or summer, can be sautéed, steamed, or added to soups. The benefits are many; it is an excellent source of minerals such as manganese, potassium, calcium, and copper. CREDIT: monte pallano - Alter vista

These plants need to be known better. They may not provide us with an abundance of food like our beloved vegetable patch does, and may not be as impressive-looking as our ornamental plants, but even with their muted colors and simple shapes, they are potent and effective! From making nutritious teas, herbal remedies, and delicious salads, to creating nutrient-rich green manure, the usually despised green intruders are, in fact, precious gems.

Annoying weeds, tasty and rich foods

Lamb’s Quar ters

Biofloral USA tel: 877-735-6725

GARDEN WEEDS

CREDIT: ar thropodafotos.de

CREDIT: Rotary Botanical Gardens

Purslane

Broadleaf Plantain

CREDIT: Sur vival Gardener

Purslane (Portulaca oleracea) is also a power food that grows generously in gardens. Par t of the succulent plant family, its shiny, crunchy, and fatty leaves are filled with health benefits. With high amounts of beta-carotene, ascorbic acid, and alpha-linolenic acid, this weed has a better nutritional value than other cultivated vegetables. Packed with antioxidants, purslane can be eaten raw in salads or sandwiches or cooked in hear tier meals like a delicious quiche.

Medicine powerhouses The humble weeds that grow freely in our gardens have fantastic medicinal proper ties. For example, Stinging nettle (Urtica dioica) is widely-viewed as troublesome due to the sharp, tingling pain it can cause when touched. But this plant is practically a health super-hero. Nettle is very nourishing, and despite its thorns, has a very gentle effect on the body. Its chlorophyll content is high, and it is also very rich in minerals, like iron. An herbal infusion from the dried herb is one of the best ways to unleash its many benefits. Stinging nettle can also be used as a very rich green manure. All you have to do is soak the fresh plant in a bucket for three weeks, and then use the strong resulting tea to water your plants. Broadleaf Plantain (Plantago major) is another example of a precious garden weed. When applied to the skin, the crushed leaves can be used as a first-aid poultice remedy to treat insect bites, minor burns, and scratches. Also, a strong tea made with plantain leaves can help soothe the stomach and intestines, treating hear tburn and other digestive conditions. CREDIT: Wag!

Stinging nettle

Dandelion - Taraxacum off icinale

From flower to root, those pesky dandelions (Taraxacum off icinale) are even good for us! Drink them in a tea or tincture, or eat them fresh in a salad to help with urinary tract issues and boost liver function.

It’s time to make an essential shift in the garden! The next time you find the “annoying weeds” popping up around your flowers or crops, gather them joyfully! Fill your basket and be thankful for their presence and their generous health benefits. A new world awakens in between the rows from plants we never set out to grow. The moment we begin discovering and understanding our weeds, our gardens have the potential to become even more productive. The usually unwelcome herbs become treasured new friends, and this can be the way to achieve a genuinely perfect garden. 3

A therapist and healer for over 15 years, Caroline’s passion for medicinal plants only began after leaving the city for the quiet country life in Quebec, Canada. Eager to learn, she’s never looked back, using forests and wildflower fields as her classroom ever since. In a time where reconnecting with plants and nature is badly needed, she spreads her love for herbalism by holding teaching workshops about the powers of medicinal herbs and natural remedies.

Bio

BY SIMON HART - GREENSTAR PLANT PRODUCTS

Plants & Fungi

The Ultimate Symbiotic and Business Relationship

PLANTS AND FUNGI

Plants and fungi are so interconnected that they almost create a superorganizm

ungi. From diverse ecosystems to life-saving medicine, almost everything is connected with them, and after a billion years of evolution, fungi are pretty fascinating. Although not at all the same, these organisms are most closely related to animals. Fungi are unique in that they grow and change shape

based on their environment. Compare it to watching tv and growing your arm to the fridge to get a drink without moving. Many of us are familiar with the fruit of fungi. When you see a mushroom growing, you see a fruit, but what grows underneath the surface is a massive fungal mycelium network. When plants came out of the water forest soil. This extensive network has The relationship and on to land 500 million years ago, several significant benefits which are between the fungi fungi were waiting and had a business passed on to the plants which choose deal to discuss. Fungi were already very to trade carbohydrates. and plants is a efficient at mining rock for nutrients. straightforward one The mycelium network, with its extensive Remember, at this point, there would have been no soil, and for plants used – you help me, and coverage, is much better at finding small to getting nutrients out of the water pockets of moisture that plant roots can’t I will help you. around them, there was a deal to access, known as hygroscopic water. This make by trading carbohydrates. And extra water makes a huge difference so began the amazing relationship between plants and for plants in times of little rainfall. These fungi also secrete fungi that have given us lichen, soil, trees – basically, life enzymes and organic acids that help mine nutrients from as we know it. sources that are not available to plants. This helps plants find the minerals they need and are particularly crucial for Plants and fungi are so interconnected that they almost nutrients such as phosphorous and iron. Beneficial fungi can create a superorganism, and one of the most important increase the root surface area by up to 1,000 times, helping relationships we have discovered so far is built on a group capture extra water and nutrients. Fungi also release useful known as mycorrhizae (mycor –fungi, rhiza – root). These substances into the soil that can help improve soil quality fungi live in and around roots, becoming an extension of the and structure like glomalin, yet another amazing benefit to plants themselves. More than 85% of the plants on Earth the plants growing around them. There are even suggestions associate with mycorrhizae. now that fungi have developed ecosystems based on who they like to work with. Quite the friend to have! The relationship between the fungi and plants is a straightforward one – you help me, and I will help you. Plants Our modern agricultural system was built before we have developed a unique food strategy, which is to harness understood anything about soil microbiology. Until late last the sun’s energy to produce carbohydrates or sugars. This century, we knew very little about the soil other than a basic energy helps them grow along with minerals and organic understanding of plant nutrients. There are still many in the material from the soil. Plants will give away some of these world of agriculture and horticulture that choose to ignore sugars to the fungi. Some estimates show plants give away the benefits of improving soil microbiology, the complexity of 30-40% of the carbohydrates they produce as well as other which may hold the key to the future of successful agriculture substances (exudates) from their roots to biology in the soil. on an increasingly hungry and evolving planet. New research But no one gets a free ride in the natural world, so what are supports the fact that fostering these fungi in the soil can the soil fungi providing to the plants? reduce fertilizer and water requirements by 30%. Amazing how many multinationals are now talking about bio-fertilizers Plant roots may seem very fine to the human eye, but and living soils. in fact, they miss vast amounts of surface area in the soil. Fungal “roots” or mycelium, are much finer and can Beneficial fungi are not present in most disturbed landscapes. contact far more ground than plant roots ever could Soil tilling, fertilization, removal of topsoil, site preparation, alone. A thimble full of soil can hold up to 5km (3 mi) compaction, and invasive species have a disastrous of the fungal filament. Take a moment to consider the cumulative effect on all soil organisms but in particular, the staggering amount of fungi that must exist in undisturbed fungal networks living in the soil. Commercial production 87

PLANTS AND FUNGI

Beneficial fungi can increase the root surface area by up to 1,000 times, helping capture extra water and nutrients

redit: ResearchGate

Fungus mycelium

Some estimates show plants give away 30-40% of the carbohydrates they produce as well as other substances (exudates) from their roots to biology in the soil Cor tex Vascular tissue

Fungus mycelium

of fungal colonies has resulted in the ability to reinvigorate the soil with fungi, which has been researched to provide improved conditions for growing crops and protecting landscape investments. Just like everything else, science is still pushing the boundaries and improving our understanding and finding new species that can handle the salty environment, like those applying fertilizer to agricultural land and our backyard gardens. Science is also culturing varieties that can handle cultivation in a farming system rather than undisturbed forest soils. So, what can this understanding of soil do for your home garden? The symbiotic relationship has existed for hundreds of millions of years, and thanks to research and development, new products for home gardeners and professional growers can now take advantage of this long-standing example of natural teamwork. There are very few of us lucky enough to have undisturbed forests adjacent to our property, and so it is essential to inoculate our soil, which simply means adding in our beneficial fungi when planting.

Different stages of Ectomycorrhizal symbiosis. (a) The symbiotic interaction star ts with the exchange of signals between the two par tners. . (b) Fungal hyphae attach to the root surface and star t to swell and branch until they completely colonize the root surface. Hyphae penetrate between epidermal cells to form a dense intercellular hyphal network, the Har tig net. (c) Mature ectomycorrhizae show three typical structures: the intercellular Har tig net (1) involved in the exchanges of nutrients between the two par tners, a dense mantle (2) that covers the root surface and (3) an extraradical mycelium that explores the soil.

By adding biology to containers, backyard gardeners or allotments gardeners can tap into the power of the natural world and bring added value to their crops. These species that help your plant might have been doing so for more than 500 million years. These ancient relationships are full of complex interactions that we are only just beginning to understand. One thing we can be sure of is that the use of biology and the movement towards living soils is a worthwhile experiment in all gardens. 3

BY CATHERINE SHERRIFFS

trending now!

MAGICAL

MOSS Possible Health And Medicinal Benefit s

MAGICAL MOSS

here’s a lot more to moss than meets the eye. This soft, lush, low-growing plant comes in various shades of green, and its environmental benefits are plentiful. Science is also finding that some species may even be great for our bodies, holding some of the same medicinal proper ties as cannabis.

Similar to Cannabis? There are an estimated 10,000 different kinds of moss growing around the world, but a Liverwort species found only in Costa Rica, New Zealand, and Japan is gaining attention for its potential medicinal effects. Swiss researchers from the University of Bern say just like cannabis, Liverwort may be useful in treating cramps, nausea, and inflammatory diseases. The main difference is unlike marijuana, this moss won’t get you high.

Just like cannabis, Liver wor t may be useful in treating cramps, nausea, and inflammator y diseases. The main dif ference is unlike marijuana, this moss won’t get you high

Moss doesn’t contain THC, the psychoactive chemical in cannabis. But it does contain perrottetinene, which has a very similar structure to THC. The researchers tested the moss on mice and discovered it might be a good alternative to THC. Despite the missing psychoactive effect, the moss was found to reduce or prevent the brain’s inflammatory processes. The study was published in the journal Science Advances, and while more testing is certainly needed, this could open the door to helping treat a variety of health conditions for people who don’t like or want the high.

Other Potential Health Benefits Beyond pain management, moss may also be good for our health. Another study by the University of Adelaide has discovered that moss possesses a complex carbohydrate called a polysaccharide that may be able to cleanse the gut.

Eco-Friendly Clumps of moss are typically found growing in wetlands or forests with a lot of shade and moisture. But many eco-friendly gardeners have taken to planting the lush ground cover in their gardens!

And why not? Not only does it add a splash of green to the landscape, but it also filters and retains water. It’s a source of food for beneficial organisms, helps with soil erosion, and even acts as a phytoremediator, meaning it can clean the earth of toxins. Moss is also one of the best air purifiers around. It removes a massive amount of CO2 from the atmosphere, which is one of the reasons why the peat-free movement is gaining steam in the horticultural world. It may not flower, grow tall, or at first glance, seem very special, but moss sure is magical. Another case of what’s good for the earth also possibly being good for our bodies.

Sources: Southern Illinois University: bit.ly/2W9C4wi Independent: ind.pn/2RFiM3i Science Advances: bit.ly/2SrJSrn Deccan Chronicle: bit.ly/2WiUCum The Plant Cell: plantcell.org Basic Biology: bit.ly/2DrQHDX Timber Press: bit.ly/2AZAXGO 3

The carbohydrate is similar to beta-glucan found in oats and cereals, but please don’t go looking through the forest for a meal of moss. The researchers behind this study say they still have a lot of work to do. In other words, don’t eat it. At this point, they think they’ve found properties in moss that can be exploited to benefit different aspects of our health. We still don’t know how these elements will be extracted or consumed. These findings are in the journal The Plant Cell.

WHAT COULD YOU DO WITH THIS?

10170 Croydon Way, Ste. G | Sacramento, CA 95827 | 866-EZ CLONE | www.EZCLONE.com

The World’s

Funkiest Smelling Fruit

t’s no secret that delicious-smelling foods can lead to an increased appetite, but take a whiff of durian and eating might be the last thing on your mind. This South East Asian fruit

holds the not-so-prestigious title of the world’s smelliest fruit. Their pungent odor is no exaggeration; durians are banned in many public places in Asia. Scientists, chefs, and foodies alike have described the aroma as comparable to rotting meat, dirty gym socks, onions, turpentine, and even raw sewage! Not exactly the scents associated with watering taste buds. What gives this spiny-looking fruit it’s gag-worthy smell? Researchers in Singapore say the durian contains a group of odor-inducing compounds that kick into high gear as it ripens. This football-sized fruit grows on trees in tropical climates and has a very short shelf life. In other words, when it falls from the tree, the clock is already ticking. Despite the strong odor, millions of people love durians and view them as a delicacy. Referred to as the ‘King of Fruits’ in Asia, those who can get past the smell say the soft and creamy flesh is both savory and sweet. It can be eaten raw or cooked and has traditionally been used as a form of medicine. Durians are very nutritious and are said to contain cancer-fighting and immune-boosting properties, among many others. Never judge a book by its cover. Bon Appetite! Sources: Smithsonian: bit.ly/2IgNsyE All That’s Interesting: bit.ly/2COHS6Y Reuters: reut.rs/2s8vatp Organic Facts: bit.ly/1KBMRVo 3

Scientists, chefs, and foodies alike have described the aroma as comparable to rotting meat, dirty gym socks, onions, turpentine, and even raw sewage! 93

BY ANNE GIBSON

TURN WASTE INTO ‘BLACK GOLD’ FOR YOUR GARDEN Composting is the natural process that turns raw organic ingredients into humus [...] also known as ‘Black Gold’ for growers 94

COMPOST

ompost is an asset sometimes called ‘Black Gold’, and for a good reason. This broken-down organic matter is a priceless resource. Creating this ‘asset’ is a way of ‘investing’ in your garden or commercially-grown plants, and can generate a healthy ‘return’ including higher yields, increased profits, and lower costs.

Composting is the natural process that turns raw organic ingredients into humus (the ear thy, dark crumbly, fully decomposed end product) - also known as ‘Black Gold’ for growers. Compost is the most convenient and easy way to return organic matter into the soil where it can produce healthy plants.

For a minimal ‘investment’ in time, ef for t, and processing organic inputs, the ‘dividends’ from compost can be significant

A Closed Loop Recycling Opportunity Compostable inputs that end up in the kitchen, such as fruit and veggies plus garden green waste, can easily be reused to cycle their embodied nutrient value, carbon, and nitrogen back into the soil to grow more food or plants. According to FoodWise, “up to 40% of the average household bin is food.” The UN’s Food and Agriculture Organ-

ization estimates that around the world, one-third of the food produced for human consumption is wasted annually, much of it ending up in landfills and producing harmful greenhouse gases. When binned, the water, fuel, and resources it took to get the food from paddock to plate are also wasted, and the potential value of a new product (compost) is lost. Imagine the amount of valuable ‘black gold’ that could be produced by also recycling the vast quantity of food waste from local businesses!

For a minimal ‘investment’ in time, effor t, and processing organic inputs, the ‘dividends’ from compost can be significant. Besides the personal satisfaction from implementing sustainable gardening practices (reducing household/garden waste, the burden on landfill and greenhouse gases), there are many other advantages.

Compostable inputs that end up in the kitchen, such as fruit and veggies plus garden green waste, can easily be reused to cycle their embodied nutrient value, carbon, and nitrogen back into the soil to grow more food or plants.

Key Benefits •

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Creates an asset in your soil by improving soil quality, leading to healthier plants, higher yields, and reduced losses. Saves money by removing the need for expensive, synthetic fer tilizers that may harm humans and the environment. Provides a natural slow-release fer tilizer. Reduces the need for frequent watering by helping the soil retain more moisture while still allowing the excess to drain away. Improves soil fer tility/vitality by adding valuable nutrients, especially crucial for food plants. Attracts and provides food for a wide variety of beneficial microorganisms in the soil food web. Combats sterile soil or ‘dead dir t’ by activating it with living micro-organisms. Increases microbial activity (decomposers), which in turn help feed plants available nutrients. Significantly improves soil structure, helping create a light, crumbly texture. Helps soil retain nutrients and air pockets for healthier plants. Improves access for plant roots to easily expand in the soil. Helps reduce and prevent pests and disease. Assists in balancing soil pH (the measure of soil acidity or alkalinity). Acts as a buffer for imbalances in the soil and helps reduce plant stress.

COMPOST

Impor tantly, compost improves human health by unlocking soil nutrients, producing more nutrient-dense food crops. All good reasons to produce and utilize this asset.

Uses for compost: • • •

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A soil conditioner for all types of plants. An ingredient to improve the quality of potting mix or to make seed raising mix. A slow release fer tilizer, gradually feeding plants over a long period without additional inputs. A mulch for pots and gardens to protect plant roots from sun/wind damage, prevent erosion, and reduce soil diseases. Top dressing for lawns, to add nutrients and fill in gaps to encourage healthier grassroots and thatch. An amendment to improve sandy and clay soil structure by binding soil par ticles together helping aerate, retain moisture and nutrients. A liquid ‘compost tea’ fer tilizer.

With so many benefits and uses, every gardener should consider turning waste into ‘Black Gold’ and enjoy a rich return on investment. 3

The FAO estimates that around the world, one-third of the food produced for human consumption is wasted annually

Sources: • •

FoodWise: foodwise.com.au Food Agriculture Organization: bit.ly/1yhlqGF

BIO Anne Gibson, The Micro Gardener, is an author, speaker and urban garden community educator on the Sunshine Coast, in Queensland, Australia. Anne is passionate about inspiring people to improve health and wellbeing, by growing nutrient-dense food gardens in creative containers and small spaces. Anne regularly presents workshops, speaks at sustainable living events, coaches private clients and teaches community education classes about organic gardening and ways to live sustainably. She has authored several eBooks and gardening guides. Anne shares organic gardening tips and tutorials to save time, money and energy on her popular website - TheMicroGardener.com. 97

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