GARDENING BOTANICAL GARDENS. Summer hours at the Tucson Botanical Gardens, 2150 N. Alvernon Way, are 7:30 a.m. to 4:30 p.m. daily. The TBG nursery is closed until October. Guided tours of the gardens are at 10 a.m. Wednesday and Saturday. Regular attractions include Birds and Gardening tours at 9 a.m. Tuesday; Gardening for the Newcomer from 9:30 to 11:30 a.m. the first Thursday and third Saturday of the month; the Native Seeds/SEARCH mini-museum of ethnobotanical displays, open 10 a.m. to 4 p.m. Tuesday and Thursday; and the TBG library, open from 1 to 4 p.m. Monday, Wednesday and Friday. Learn about Food Plants of the World, part of the Plants Useful to Humankind series, from 10 a.m. to noon Saturday, August 3. Cost is $21, $8 for the series or $15, $6 for members, pre-registration required. Admission is $3, $2 for seniors, and free for children under 12. Call 326-9255 for information. CALL FOR DOCENTS. TBG needs docents! Anyone interested in volunteering is encouraged to apply for the 10-week course, which begins on Friday morning, September 27. Call 326-9686 for information. TUCSON ORGANIC GARDENERS. The Master Composters of the Tucson Organic Gardeners staff a compost demonstration site at the Tucson Botanical Gardens from 9 a.m. to 1 p.m. every Saturday to answer your composting questions. Call the Compost Assistance Line at 670-9158; or call 883-0377 for information on monthly lectures starting in September.

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