Seed bombs, tomato plants on demolition sites, moss art on concrete walls: A unique form of gardening, known as Guerrilla Gardening, first emerged in Manhattan in the 1970s and has grown into a global movement, gaining more and more followers. Gardening has become cool! Guerrilla gardeners operate secretly: Under the cover of night, they plant traffic islands, occupy vacant lots by making them fertile, or take action with flowers against the neglect of their own apartment blocks – because public space belongs to everyone, not just the parks department. Londoner Richard Reynolds, who has been active as an urban gardening guerrilla for five years, offers a virtual meeting point on his website for this international community of botanical activists, where they can also exchange ideas about joint greening actions.