Editor's note: Chronicle staffer Jane Tunks, a novice gardener, is using The Chronicle's rooftop garden as her classroom, with Fred Bové and Kevin Bayuk from the San Francisco Permaculture Guild as ...

Staff photo / J.T. Whitehouse Springtime is time for preparing beds for planting as Holborn Herb Growers Guild member Stephanie Ensley demonstrates as she cuts back the decorative grass at the Western ...