Guerrilla gardening is gardening without permission on land that belongs to another. The term "guerrilla gardening" was coined in New York City in the early 70s by Liz Christy, a member of a group of artists and students who called themselves the Green Guerrillas.
Guerrilla gardening originated as a means to draw attention to land use issues and counteract urban blight. The Green Guerrillas created its first community garden, the Bowery Houston Farm and Garden, at the corner of Bowery and Houston Streets in New York City. The group worked to encourage people to use community gardening as a means to come together to solve neighborhood problems. As of 2014, New York City gardeners have created more than 600 community gardens that feed families, educate children and create community.