Lavender, and other drought resistant species, can be planted to help save water
The London Wildlife Trust has issued a seven point plan to help transform your urban garden into a wildlife and climate-friendly space.
'Garden for a living London' will help city gardeners across the capital get tips and advice including how to turn your shed roof 'green'.
Other advice includes how to create a pond in your garden and which drought resistant plants can be used to combat climate change.
Londoners can pledge to do one thing that could help create a natural habitat for birds, insects and small mammals.
Other tips could see the capital's three million gardens provide shade, absorb carbon, soak up flood water and help to cool buildings.
Carlo Laurenzi OBE, Chief Executive of London Wildlife Trust, said: "London's gardens are a vital resource for people and wildlife, especially as we face up to the realities of climate change.
Drought resistant plants usually have leaves that are small, fleshy, waxy or hairy
Plants such as Fatsia, Laurel and Euphorbia, will tolerate dry shade and provide shelter
Broad-leaved trees provide food, shelter and nesting places for many species of wildlife
A series of ponds in a neighbourhood creates essential corridors for wildlife to move and adapt to climate change
Ponds also store a large amount of carbon, helping to reduce the impact of climate change
"Lots of Londoners have joined our Garden for a Living London campaign and pledged to do one thing to make their outside space more wildlife and climate friendly, but we need to do more.
"Our Life Cycle Garden shows both how important and how fun wildlife and climate friendly gardening is."
The Life Cycle Garden
At this years RHS Hampton Court Palace Flower Show the London Wildlife Trust will be showing its Life Cycle Garden - a sustainable garden that explores the natural cycles that are essential to successful wildlife and climate friendly gardening.
Construction taking place for the Life Cycle Garden at Hampton Court.
The garden will display all the stages in plant life cycles including death and decay and highlights what can be achieved within small city gardens.
Elaine Hughes, London Wildlife Trust's expert gardener, and a team of volunteers have been busy constructing the garden.
It features hedgerows with windows, a living table and chairs and drought resistant planting.
It has been designed with sustainability as the garden's theme.
The surfaces have been designed for maximum water absorption, there are recycled steel drums for rainwater collection and compost bins made from recycled wood.
The RHS Hampton Court Flower Show runs from 7-12 July 2009.
Londoners can pledge online and download tips from the London Wildlife Trust 'Garden for a Living London' website.
Have you made use of your green space? Let us know if you've transformed a window box, roof terrace or urban garden.