Long Blooming Perennials Dennis Morgeson Agent For Horticulture Washington County
What are perennials? 0 Plants that live for several years 0 Mostly herbaceous in nature 0 Multiply by seeds and increase in size of parent plant
0 Most grow from a crown, stolon's or rhizomes 0 Some live for a few years, some for decades
Perennials Care issues: Preparing the soil Spacing Planting and transplanting Propagation Watering, one inch per week Fertilizing, 2-3 lbs. 5-10-10, two spring applications
Perennial Considerations Design issues: 0 Height, placement in the bed or border 0 Color combinations
0 Continuation of bloom!!!! 0 Foliage textures
Achillea filipendulina- Yarrow 0Many colors, flower in late
spring to summer 02-3 feet tall and wide, dwarf varieties 8-15 inches 0Few pests 0Borders, cut flowers, dried 0Cuttings or division in spring or fall, some by seed 0Varieties-Coronation Gold, Gold Coin Dwarf, Goldie, Moonshine 0Trim back after bloom for rebloom
Achillea millifolium- yarrow 0 Wider range of colors
than previous species 0 Generally grows no more than 2 feet tall 0 Spreads faster, can become aggressive 0 Performs well in dry areas 0 Lots of varieties such as Paprika, Strawberry Seduction, Pomegranate, Summer Wine, etc. 0 Trim back after bloom for rebloom
Agastache (Hyssop) 0 Likes full sun and well
drained soils 0 Grows up to 3 feet wide and tall 0 Pinch early to keep them more compact but not required 0 Doesn’t do well in wet heavy clay but thrives in well drained soils 0 Pollinator and insect magnet 0 Blooms all summer
Agastache Varieties
Black Adder
Kudos Gold
Blue Fortune
Golden Jubilee
Raspberry Summer
Aster spp. - Asters 0Flowers in blues, violets,
whites in summer and fall 01-6 feet tall, taller varieties must be staked 0Powdery mildew is the major pest 0Used for borders and cut flowers 0Propagate by division in spring
Asters Aster tataricus “Jindai”
Blue Autumn
Little Carlow
Winston Churchill
Baltonia asteroides (False Aster) 0 Grows 3-5 feet tall and
Snowbank
Pink Beauty
wide will need staking 0 Plant in full to part sun, tolerant of a variety of soils 0 This is an undemanding native loved by butterflies! 0 Blooms August until frost
Centranthus ruberJupiter’s beard 0 Vigorous perennial for
well-drained soils 0 Tolerates poor soils if drainage is good 0 Dead head to extend bloom season 0 Red Valerian
Ceratostigma plumbaginoides – leadwort Plant in full to part sun Will tolerate some shade but prefers full sun in average soil Generally late to emerge but blooms from mid summer until frost and gives a nice fall color Wiry semi woody groundcover, grows 9-12 inches tall and 18 inches wide
Chrysanthemum x superbum (Lucanthemum x superbum)– Shasta Daisy 0White flowers in early
spring 01-3 feet tall 0Major pest – aphids 0Used in borders, cut flowers 0Propagate by division in fall, seed
Shasta Daisy Summer Ice
Lacrosse (Compact Habit)
Becky
Coreopsis -tickseed 0 Many species with
varying plant habits 0 New colors and all bloom for an extended period, also varying foliage types 0 Dead head to extend bloom season 0 Best divided regularly to maintain vigor
Coreopsis
Crème Brulee 8-12” Cosmic Eye 12-20”
Full Moon 18”
Coreopsis
Jethro Tull
Red Satin
Route 66 Zagreb
Sweet Dreams
Sienna Sunset Moonbeam
Dianthus - pinks 0 Many species and forms,
0 0 0 0 0 0
many evergreen, prefers full sun and well drained soil Most are easily grown Range in height from 4�-3’ Many form spreading groundcovers Attractive spiky silver foliage Fragrant, rebloom after cut back and in fall Attracts butterflies
Dianthus
Agatha
Arctic Flame
Bath’s Pink
Pink Swirl
Horatio
Desmond
Greystone
Helen
Echinacea – Coneflower 0Varied flower colors but
the purple and white still seem hardier 0Varying heights from 15 feet tall 0Major pest is powdery mildew 0Used as border or cut flowers 0Divide clumps in spring or by seed 0Deadhead for repeat bloom 0Yellow Finch will eat seeds if allowed to mature
Coneflower
Cheyenne Spirit
Firebird
Paradoxa* Leilani
Double Decker
Secret Pride
Pallida*
Pink Poodle
Geranium sanguineum Cranesbill Geranium 0Flowers in white, violet,
red in late spring 01 - 1½ feet tall 0Few pests 0Used as a border or edge plant, protect from afternoon sun 0Propagate by seed, some by cutting 0Deer resistant, groundcover, attracts butterflies
Hardy Geranium
Ballerina
Bevans Variety
Biokova
Rozanne Dark Reiter
Purple Who
Samobor
Wlassovianum
Eupatorium coelestinum – hardy ageratum 0 Very vigorous plant,
particularly in moist soils 0 Cut back in summer to shorten and increase flowering 0 Divide regularly
Wayside
Eupatorium rugosum 0 Grows 3-5 feet tall and
Chocolate
3 feet wide 0 Mid summer to fall bloom 0 Full Sun to half sun 0 Normal soil even clay 0 Attracts butterflies, wet site tolerant as well 0 Purple green foliage also ads interest
Eupatorium purpureum* – Joe pye weed 0 Stately perennial can
grow to 10‘ Native plant attracts butterflies 0 Smaller dwarf versions are available 0 May reseed around the garden 0 Enjoys wet locations but will grow in average garden soil
Joe Pye Weed
Gateway 6’
Fistulosum* 3-4’
Little Joe 3-4’
Euphorbia - spurge
0 Many different forms,
Robbiae
some evergreen 0 Very tolerant of poor dry soils 0 Milky sap may be an irritant to skin or eyes 0 Deer resistant and drought tolerant 0 Often self seeds
Euphorbia Bonfire
Polychroma*
Chameleon
Tiny Tim
Jade Dragon
Gaillardia x grandiflora – blanket flower 0 Very long bloom period
in summer 0 Tends to be short lived 0 Excellent for dry areas 0 Often seeds itself in good soils 0 Deer resistant 0 Attracts butterflies 0 Drought Tolerant
Gaillardia
Bright Bicolour
Red Sun
Yellow
Peach
Sun Flare
Sun Devil
Helenium autumnalesneezeweed
0 Tall perennial valued
for its fall blooms in yellow orange and red (newer shorter varieties) 0 Prune in summer or stake to support 0 Adaptable plant tolerates many soil types 0 Native 0 Can reseed
Sneezeweed Mardi Gras
Moerheim Beauty
Autumnale*
Double Trouble
Tiny Dancer
Red Jewel
Carnival
Heliopsis helianthoides 0Yellow flowers in summer
and early fall 03-4 feet tall 0Few pests 0Used as a border or cut flower 0Propagate by seed or division 0Touch Plant!
Heliopsis helianthoides
Lorraine Summer Nights
Summer Sun
Lemon Queen
Sunburst Asahi
Hibiscus moscheutos – Hardy Hibiscus White, red, pink and
bicolors in summer, newer varieties bloom until late fall 3-8 feet tall, taller ones require staking Major pests are Japanese beetles and caterpillars Used as border plants Propagate by division or seed Prefers moisture but tolerates drought
Hardy Hibiscus
Fantasia
Lord Baltimore
Fireball
Kopper King
Lady Baltimore
Plum Crazy
Hardy Hibiscus Sweet Caroline
Moscheutos* Blue River II
Heartthrob
Cherry Cheesecake
Robert Flemming
Midnight Marvel
Summer Storm
Monarda - beebalm 0 Very vigorous plant is
Jacob Cline
invasive in good soils 0 Loved by hummingbirds and butterflies 0 Tolerates moist areas 0 Powdery mildew is a huge problem prune hard to control or select mildew resistant varieties
Beebalm Petite Delight
Raspberry Wine
Claire Grace Blue Stockings
Grand Mum
Fireball
Pardon My Purple
Oenothera fruiticosa 0 Rapidly spreading plant
with yellow flowers in spring 0 Often short lived 0 Reddish stems 0 Tolerates dry soils
Fireworks
Other Oenothera
Summer Solstice (tertragona)
Sunset Boulevard (versicolor)
Oenothera speciosa – showy primrose 0 Aggressive- leaning
Siskiyou
toward invasive 0 Large pink flowers over a long period in spring and summer 0 Cut back after bloom to encourage repeat 0 Deer Resistant 0 Groundcover
Perovskia atriplicifolia Russian Sage 0Blue flowers in summer 04-6 feet tall, shrubby Filigran
0Few pests 0Used as a border 0Propagate by cuttings,
division, or seed
Little Spire
Superba
Physostegia virginiana – obedient plant 0 Native plant in pink or
white 0 Spreads aggressively in good soils 0 Tolerates moist areas 0 Good cut flower 0 Divide frequently
Miss Manners
Pink Manners
Vivid
Rudbeckia fulgida - Black-eyed Susan 0Yellow flowers in
summer to fall 02-3 feet tall 0Powdery mildew is the main pest problem 0Used as a border, cut or meadow flower 0Propagation by division or seed Goldstrum
Rudbeckia Fulgida
Autumn Sun
Little Goldstar
Henry Eilers
maxima*
lancinata*
Salvia nemorosa – Garden Sage 0 Reliable plant with long
bloom season in late spring 0 good for drier areas 0 Aromatic foliage 0 Cut back after bloom for a second, smaller flush of bloom Blue Hill
Garden Sage New Dimension Marcus Blue
May Night
Plumosa
Caradonna
Sensation Deep Rose
Swan Lake
Sedum spp. - Stonecrop 0Yellow, orange, red
flowers in summer but generally grown more for foliage 03-8 inches 0Few pests 0Used for edging, ground covers, rock gardens 0Propagation by division or seed
Sedum spectabile - Showy Sedum 0Pink, red, white, lilac
flowers in late summer and early fall 012-18 inches tall 0Few pests 0Used as a border, edging, cut flower or dried 0Propagation by division or cuttings 0Drought tolerant Autumn Joy
Sedum
Autumn Charm
Murale
Autumn Fire
Munstead Red
Blade Runner
Blue Spruce
Dragons Tongue Cherry Tart
Brilliant
Carl
Sedum Neon
Pool Party
Purple Emperor Red Cauli
Turkish Delight
Mendoza
T Rex
Begonia grandis - Hardy Begonia 0Pink flowers in summer 018-24 inches tall 0Few pests 0Used in borders 0Propagate by tubers (may
not be hardy) or bulbils 0Full to part shade in protected sites only
Helleborus orientalis – Lenten Rose 0White or purple flowers in
late winter and early spring 012-15 inches tall 0Few pests 0Used as a border plant 0Propagate by division or seed 0Shade!
Hellebores Amber Gem
Cotton Candy
Golden Lotus
Rose Queen Sunshine Selections
Black Onyx
Questions?
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