When Richard Reynolds began planting flowers secretly at night outside his tower block in South London he had no idea he was part of a growing global movement committed to combating the forces of neglect, land shortage and apathy towards public spaces. But his blog GuerrillaGardening.org attracted other guerrillas from around the world to share their experiences of the horticultural front line with him and become a focal point for guerrilla gardeners everywhere. "On Guerrilla Gardening "is a lively colourful treatise about why people illicitly cultivate land and how to do it. From discretely beautifying corners of Montreal to striving for green communal space in Berlin and sustainable food production in San Francisco, from small gestures of fun in Zurich to bold political statements in Brazil, cultivating land beyond your boundary is a battle many different people are fighting. Unearthed along the way are the movement's notable historic advances by seventeenth century English radicals, a nineteenth century American entrepreneur and artists in 1970s New York. Reynolds has researched the subject with guerrilla gardeners from thirty different countries and compiles their advice on what to grow, how to cope with adverse environmental conditions, how to seed bomb effectively and to use propaganda to win support."On Guerrilla Gardening "gives entertaining inspiration, practical reference and no excuses for not getting out there and gardening.