GARDENING BOTANICAL GARDENS. The Tucson Botanical Gardens, 2150 N. Alvernon Way, are open daily from 8:30 a.m. to 4:30 p.m. The TBG nursery is open from 9 a.m. to noon Tuesday through Saturday. Regular admission is $4, $3 for seniors, and free for members and children under 12. Call 326-9255 for information. GARDENING DEMONSTRATIONS. Free one-hour demonstrations are offered by the Pima County Cooperative Extension at 1 p.m. Wednesdays at the Wilmot Library, 530 N. Wilmot Road. Bob Ishmael discusses Drip Irrigation--Winter Watering Schedule, Wednesday, November 13. Call 626-5161 for information. TRÉS TASTY. Learn more about Arizona's native desert plants and their taste-a-bility during a three-week course entitled Hot, Sweet and Sticky--Wild Foods of the Desert, offered by the Arizona Archeological and Historical Society. Ethnobotanist Kevin Dahl, of Native Seeds/SEARCH, discusses mesquite, saguaro, cholla, wild greens and berries at 7 p.m. Thursday, November 8. Cost is $35, $25 for members. Call Jan Bell at 326-6709 for registration and information.

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