Greenhouse enthusiasts may be interested to hear guerrilla gardener Richard Reynolds is setting about trying to find more followers to help in his bid to brighten up big cities.
Mr Reynolds, based in London, began waging his war against the "neglect and scarcity of public space as a place to grow things" seven years ago.
Since then he has been filling traffic islands and potholes with flowers, fruiting trees and plants.
As the military name suggests, the guerrilla gardener believes that with a bit of nous and stealth he has been slowly winning the hearts and minds of the public.
"What I really enjoy now, is passers-by stopping and going 'I'd like to join in'. It's then you feel like Father Christmas," he told the Eastern Daily Times.
The guerrilla gardener's website displays photos sent in by members of the public who follow the project and have planted their own flowers in public places.