Ideas for water management in gardens and green spaces
Managing water collection and usage in gardens is an important part of gardening sustainably. The climate is becoming more unpredictable and it’s important to adapt as there are increasing pressures from an ever-changing climate. There may be too much rainfall or not enough and gardeners need to adjust to the changes. We need to build ‘climate-resilient’ gardens.
Around 5 million people live in flood risk areas in England and Wales and one in six homes in England is at risk of flooding. It is estimated that by 2050 one in four houses will be at risk (Environment Agency, December 2024).
Some useful things to do are to mulch your garden to keep in moisture and choose plants with deep roots. Consider green roofs and water butts to manage roof runoff. In dry times save household water to water plants. Here are some more ideas and websites.
Change Impermeable Surfaces
Permeable Paving: Replace concrete or block paving with permeable alternatives like loose stones, gravel, or grass reinforcement grids. This allows water to drain through.
Green Roofs: Install plants on a roof surface to absorb rainwater, release it slowly, and provide habitat for wildlife.
Gravel gardens: Choose to have a gravel garden and this means less watering. www.gardenersworld.com/how-to/maintain-the-garden/gravel-garden-ideas/
Improve your Soil and choose plants wisely
Mulch: Apply a layer of mulch to keep moisture in and to slow down water runoff. Mulches help soil keep moisture in summer, prevent weeds from growing, help the soil warm up in spring and protect the roots of plants in winter. A mulch can be a layer of garden compost, wood chippings, leaf mould or straw. A mulch can also be slate, pebbles, gravel, stone chippings.
Use Plants with deep Roots: Plant vegetation, especially plants with deep or spreading roots, to stabilise soil and absorb water more effectively.
Improve Lawn Drainage: Regularly aerate lawns with a garden fork to add air to the soil and improve water drainage.
Choose plants carefully: Perennial plants can cope better with irregular watering. Choose drought resistant plants. Right plant; right place! www.rhsplants.co.uk › right-plant
Manage Water - slow it, spread it, sink it.
Rain Gardens: Create a shallow, planted depression that collects and absorbs runoff from roofs and other impervious surfaces. Direct downspouts into the garden bed, which should have absorbent soil and water-tolerant plants. https://www.wwt.org.uk/discover-wetlands/gardening-for-wetlands/how-to-make-a-rain-garden
Swales: Dig shallow trenches or channels on contour lines to slow water flow, filter it, and allow it to soak into the ground.
Terracing: Build steps or terraces into a slope to break up the steepness, creating level areas where water can soak in rather than run off.
Water Butts: Place water butts (rain barrels) under downpipes to collect rainwater for later use and gently let it seep out. Divert water away from drains, drives and property.
Soakaways: Build underground pits filled with gravel or plastic crates to collect excess rainwater and allow it to slowly seep into the ground.
‘Grey water’: Use grey water from washing up, or clothes washing, instead of tap water. This will also save on your water bill.
Further Resources
A useful book for advice is The Climate Change Garden, Down to Earth Advice for Growing a Resilient Garden, by Sally Morgan and Kim Soddart.
The Royal Horticultural Society (RHS) also has helpful advice: RHS New Gardening: How to Garden in a Changing Climate, by Matthew Wilson
RHS Report: Gardening in a changing climate https://www.rhs.org.uk/science/gardening-in-a-changing-world/climate-change