Students, parents and teachers work on the garden at the 24th Street School garden on Big Sunday, the largest annual citywide community service event in America, West Adams, Los Angeles.

Young boys collect food for the worm compost bin after their class mates eat their lunch at the Downtown Value School, a charter school in downtown Los Angeles.

Urban garden encircles house in Rancho Palos Verdes.

Judy Kirshner working in her garden in upscale Hancock Park. Foraging for wild edibles in Los Angeles neighborhood Echo Park.

Young girls and their mother learn about the garden at their elementary school. Wonderland Elementary School, Laurel Canyon, Los Angeles.

Teacher Chris Medinger holds a snow pea plant for repotting in the small greenhouse at the Downtown Value School, a charter school in downtown Los Angeles.

School Children learn about and tend the vertical garden at the Downtown Value School, a charter school in downtown Los Angeles.

New seedlings ready to be planted at the Venice Community. Garden. First harvest at the Venice Community. Garden, which includes zucchini, swiss chard, yellow squash and cucumber

The Seed Library of Los Angeles (SLOLA) is located at the Learning Garden at Venice High School.

Volunteers planting Citrus trees along Elmer Avenue.

The Center for Urban Agriculture at Fairview Gardens is one of the oldest organic farms in California. Santa Barbara

The Center for Urban Agriculture at Fairview Gardens is one of the oldest organic farms in California. Santa Barbara. Yvonne Savio, Master Gardener Coordinator at UC Cooperative Extension's Common Ground Garden Program, Pasadena.