Green Fingers

GreenFingers

The Alan Titchmarsh column

He’s a brilliant presenter, accomplished gardener, talented novelist, and all-round horticultural inspiration. This month, Alan Titchmarsh discusses how our gardens can become carbon sinks. I was recently asked how our green spaces might change if the planet continues to hot up. Certainly, I am not a climate change denier, but I think for our own peace of mind we need to keep things realistic, and it’s not as if within 50 years we’re going to be growing bananas in Northumberland or anything like that! What we can of course do in the short-term is style and shape garden space to ensure we help the planet as much as we can. After all, the most basic way to prevent greenhouse gases like carbon dioxide from entering the atmosphere (and warming up the climate) is by growing plants. And as gardeners, that’s what we do! The best way to achieve this is by growing native plants. Non-native varieties can really take hold of a space, requiring harmful chemicals to control them, and leading to them being pulled up, exposing soil and releasing carbon. We can also compost – it’s a great way of stopping carbon getting out in the first place. The same applies to mulching, too. When you consider that over 80% of the carbon in your garden is released from the soil, by adding a layer of wood bark chippings, for instance, you are holding the carbon in the soil. It’s for this same reason that turning over soil is actually bad for your garden. Not only does it interrupt nature’s ability to let your earth matter settle into an organised pattern that benefits both plants and the creatures living in the soil, but turning over, or tilling, releases more carbon. Beyond this, we can be more environmentally friendly by using organic fertilisers; and never be afraid to let your outdoor space ‘go wild’. Rustic gardens are the ultimate low-carbon spaces, and that makes sense, because wild areas such as forests, wetlands and mangroves are the very best at protecting against the risks posed by climate change. As ever, our gardens hold within them the power not just to transform our own lives, but the welfare of the planet too, and that is why we love them so much.

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