Farmers' market season has begun, so there's no excuse not to stock up on fresh veggies. But the HOMEGROWN CHICAGO MARKET in Humboldt Park offers a twist: The food and flowers are grown without pesticides by local community and backyard gardeners, not professionals. June 25, 2005 from 9:00 a.m. to 1:00 p.m. 2626 W. Division St., 312-427-4256, http://www.openlands.org