Green Stuff West Bay

The Art of Pruning Deciduous Trees & Shrubs An in-depth study. Register at the beginning of class. 9:30 a.m.-12:30 p.m. Sat. $32. Landscape Horticulture Dept., Merritt College, 12500 Campus Dr., Oakland. (510) 436-2418.

Bonsai "Chokkan -- Formal Upright Style," a lecture and workshop presented by the Diablo Bonsai Club. 7:30 p.m. today. The Gardens at Heather Farm, 1540 Marchbanks Rd., Walnut Creek. (925) 736-9157.