Halawa Xeriscape Garden, 527-6113: Free admission to garden of dry-land plants at Halawa Industrial Park 10 a.m.-2 p.m. Saturdays and Wednesdays.

Guided tours are free on Thursdays and the last Saturday of each month; call 527-6113 for an appointment.

Hawaii Bonsai Association: Bonsai show, 9:30 a.m.-9 p.m. Aug. 30; 10 a.m.-5 p.m. Aug. 31; and 10 a.m.-4 p.m. Sept. 1, Windward Mall. Bonsai demonstration by Dennis Makishima, 1:30 p.m. Aug. 31. For information, call Marynne Lee, 623-1070.

Ho'omaluhia Botanical Garden, 233-7323: Learn about rain forest plants 10 a.m. Saturdays and 1 p.m. Sundays. Free. Bring walking shoes, bug repellent, rain gear and a picnic.

Compost workshop, 9:30-11:30 a.m. every fourth Saturday of the month. Bring walking shoes, insect repellent, rain gear and work gloves.

Kahala HydroGreenery, 735-8665: Hydroponic gardening class, 9-10:30 a.m. Saturdays. Free. Reservations, 735-8665.

Lyon Arboretum, 3860 Manoa Road, Honolulu, 988-7378: "Photographing Plants, Flowers, and Landscapes" with Madame Francoise Winieska, 8:30-11:45 a.m. tomorrow, downstairs classroom. Cost: $15.50. Call 988-3177.

Annual plant and craft sale, 9 a.m.-2 p.m. Aug. 23, Blaisdell Center. Free admission. Information: 988-7378.

Mililani Bonsai Club: Bonsai exhibit and plant sale, 9 a.m.-2 p.m. Aug. 16, Mililani High School Cafeteria. Bonsai demonstration, 10:30 a.m.

Wahiawa Botanical Garden, 621-7321: Hands-on gardening, 9-11 a.m. Wednesdays. Free.