From DC to LA, organic gardens are cropping up everywhere! Most recently, Nicole Richie was caught with shovel in hand at Helen Bernstein High School in Hollywood. Along with Rosario Dawson, Amy Smart, and Lance Bass, Richie offered her green thumb to the Environmental Media Association’s Young Hollywood Board. As part of the program, each celebrity will adopt a particular school within the Los Angeles Unified District, where they’ll be responsible for planting and maintaining their organic garden. Here’s hoping their plants and plots will help clear some of the most polluted air on the planet!