How 'Guerrilla Gardening' Can Change Your City

A nervous breakdown compelled Paul Dalton, a horticulturalist in Kilkenny, Ireland, to do something he hadn’t done before: Go about town, putting plants in the ground in places he wasn’t supposed to. He and the many others around the world who discreetly garden in places where they don’t have the legal rights to do so are guerrilla gardeners. “Guerrilla gardening allows creativity and expression,” Dalton writes via email, and has become a way to make friends.