Edible Urban Garden Tour - July 17th, 2012 Greening DC One Garden at a Time is the theme for this year's tour. Save the date so that you can join us for guerrilla gardening (learn how to make a seed bomb), a tour of some of DC's best public and private edible gardens, and a festive gathering at Old City green with food, cocktails and music by the Sligo Creek Stompers.