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12 ways to grow a low-carbon garden

A low-carbon garden buzzes with life, sparkles with water, and is packed with plants. If designed well, it can act as a carbon sink, actively combatting climate change

As gardeners, we have a chance to  make a direct, practical difference in combatting climate change. Every time you grow a tree,

mulch your soil, or let your grass grow long, you could actively be increasing the carbon your garden absorbs.

Too often, though, we return all that carbon dioxide right back into the atmosphere by firing up a petrol-powered mower, filling pots with peat-based compost, or scattering artificial fertilizers. So, low-carbon gardening needs a twin approach. Lower your carbon emissions to neutral by gardening sustainably, then maximize the carbon your garden sequesters and stores, and help it actively combat climate change.

Gardening sustainably is a journey, and it’s fine to start small and work up to the bigger changes later. The important thing is that everyone does something.

Sally Nex, author, columnist and lecturer

Twelve elements of a low-carbon garden

If space in your garden is restricted, any element from this design can be borrowed and adapted to fit a smaller garden

1. Grow a hedge

Not only do hedges actively sequester and store carbon, they also providing nesting sites, food sources, and shelter for wildlife.

Use the links below to find out more about hedge habitats, including advice on planting and trimming hedges.

Hedges are the most eco-friendly type of garden boundary

Hedge and woodland edge habitats

Hedge and woodland edge habitats

Introduction to hedges

Introduction to hedges

Native shrubs for hedging

Native shrubs for hedging


2. Make a fedge

A fedge is a fence built from waste wood and prunings

Fedges serve as somewhere to stack woody garden waste while it slowly rots down, providing shelter for wildlife, too. These beautiful woven borders can provide windbreaks and a handy way to dispose of anything too woody to go on the compost heap.


3. Grow your own plant supports

Coppices of hazel, birch, willow and dogwood trees provide a renewable, carbon-free source of beanpoles and pea sticks as well as a wildlife habitat. Hazel is best for the uprights, and willow for weaving poles together – don’t stick willow into the ground as it roots very readily.

Coppiced hazel poles have a much lower carbon cost than imported bamboo canes

4. Pick greener ways to grow your own

The veg garden at RHS Harlow Carr makes use of plant supports fashioned from hazel and willow grown on site
Home-grown food, when grown sustainably, has a much lower carbon footprint than that produced by conventional agriculture. Vegetable gardens store more carbon when permanently planted with fruit trees, berries, and perennial vegetables, interspersed with annuals to fill gaps. Use mulches such as homemade compost, make paths from woodchip rather than concrete or grass, and grow organically for maximum carbon benefit.

5. Make your own compost

Composting at home has multiple environmental benefits

Compost bins make good use of green waste from the kitchen and garden; this avoids waste going into landfill where it releases methane, a greenhouse gas 80 times more powerful than carbon dioxide. Soil mulched with compost holds on to nutrients and rainwater better, so meaning less need to water and feed your garden. An all-round winner!

 

6 Plant a tree

Trees suck in carbon, storing it in lignin-rich trunks and locking it in the ground. Plant a tree in your garden and you help offset not just your own carbon footprint, but that of your children too. It's one of the most effective ways your garden can help fight climate change.

It's estimated that on average a single broadleaf tree stores 2.9 tonnes of carbon in its lifetime

Composting

Composting

Coppicing

Coppicing

Trees for climate change

Trees for climate change

How to plant a tree

How to plant a tree

A billion tiny actions have brought us to the edge of environmental crisis. And a billion tiny actions can pull us back from the brink.

7. Let your lawn show its wild side

Let the grass grow and you'll be surprised how many flowers appear
Meadows of naturally occurring wildflowers are threaded with closely mown paths, which lead through the clouds of butterflies, bees, and other insects that thrive here. Having a mown path helps keep it looking 'gardened'. Put away the mower and your lawn reverts to something resembling natural grassland – one of the most efficient carbon sinks.

8. Try a tapestry lawn

There are many delightful plants you can grow in a lawn instead of grass, such as this Acaena

Tapestry lawns are full of flowers and low-growing, mat-forming plants. No-grass lawns have the benefits of a grass lawn but without the eco-drawbacks of weekly mowing. There are many suitable plants inluding white clover, chamomile, creeping thyme and yarrow.


9. Make a rain garden

Rain gardens and ponds are designed to absorb excess rainwater; in the diagram at the top of this article the densely planted damp garden also feeds into a deeper pond. This helps reduce flooding, benefitting both you and your neighbours.

Even a small front garden can be turned into a rain garden

10. Grow lots of long-lived plants

Choose trees, shrubs and perennials instead of annuals and bedding plants for maximum benefit

Flower borders line the central path, with layers of trees, shrubs, and perennials. Focus on long-lived plants; this means less replanting and less soil cultivation, helping you avoid disturbing fragile ecostystems and releasing carbon that was locked in underground.


11. Harvest rainwater

Connect water butts to downpipes for an eco-friendly water supply

Every litre, or gallon, of mains water you use adds to your carbon footprint. Rainwater harvesting will keep your dependence on mains water supplies to a minimum in summer. The best approach of all is to minimise your water use, wherever it comes from, by mulching and picking your plants carefully.

Even a small front garden can be turned into a rain garden

12. Green up your driveway

Bugle, violets and Arenaria grow well between the tyre tracks

Driveways of reclaimed stone slabs and infilled with low-growing plants provide parking but with added beauty, wildlife value and rainwater absorption. Concrete has a high carbon cost, so minimising its use will help keep your carbon footprint down. 


More low-carbon gardening ideas

Make a low-carbon wildflower meadow

Make a low-carbon wildflower meadow

Grow your own garden sundries

Grow your own garden sundries

Low-carbon container growing

Low-carbon container growing

Grow a potted mini orchard

Grow a potted mini orchard

Using sustainable materials

Using sustainable materials

Planting a low-carbon garden

Planting a low-carbon garden
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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.