"I'm inspired by the power gardening gives us to shape the world around us, especially where we can turn urban desert into a magical forest.
"It only takes a thousand trees to remove 90 tons of carbon dioxide from our air, every year. If we can harness the power of plants to transform these unused spaces, the benefit to everyone is both immediate and long-lasting: it will change the way we live and work. A garden is the ultimate renewable resource, economically, energy-wise, socially."
Jennifer Hirsch - designer of Up On The Roof
Vote now for your favourite garden in the BBC RHS People's Award.