THISWEEK

Halawa Xeriscape Garden, 527-6113: View dryland plants at Halawa Industrial Park 10 a.m. to 2 p.m. Saturdays and Wednesdays. Free. Guided tours are free on Thursdays and the last Saturday of each month; call 527-6113 for an appointment.

Ho'omaluhia Botanical Garden, 233-7323: Volunteer training program for people interested in becoming nature tour leaders, 9:30 to 11:30 a.m. Saturdays, through May 17.

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

Kahala HydroGreenery, 735-8665: Free hydroponic classes, 9 to 10:30 a.m. Saturdays in April, except April 26. Reservations needed.

Lyon Arboretum, 3860 Manoa Road, 988-7378: Bob Itoman will teach how to vanilla cultivation, 9:30 to 11:45 a.m. Saturday, downstairs classroom. Cost: $17.50.

Learn how to raise fruit trees with Frank Sekiya, 9:30 to 11:45 a.m. Saturday, Frankie's Nursery, 41-999 Mahiku Place in Waimanalo. Cost: $15.50. Call 259-8737.

High nutrition gardening with Janice Ito, 12:30 to 2:30 p.m. Saturday, downstairs classroom. Limited enrollment. Cost: $17.50.

Doug De Moss discusses how to care for orchids, 9:30 to 11:45 a.m. April 18, downstairs classroom. Limited enrollment. Cost: $8.

Urban Garden Center, 453-6050: Gardening series classes 9:30 to 11:30 a.m. Wednesdays, 962 Second St. Next week's topic is cucumbers. Costs $5. Call for registration.

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