GARDENING BUTTERFLY GARDENING WITH NATIVE PLANTS. Pima County Cooperative Extension. 4210 N. Campbell Ave. 626-5161. Gardening demonstration uses samples of plants brought in for identification, diagnosis and treatment. The free one-hour meeting starts at 9 a.m. on Wednesday, October 9. EVERGREENS & EVERGREYS. Civano Nursery. 5301 S. Houghton Rd. 546-9200 ext. 9. Learn which evergreens work when designing a naturalistic garden in the desert at 9 a.m. on Saturday, October 5. It's free, but call to reserve a space. GARDENING CLASSES. Harlow Gardens. 5620 East Pima. 886-5475. Free classes include: "Roses" on Friday, October 4, at 10 a.m. "Shade ... a look at 10 good shade trees for Tucson gardens" on Friday, October 4, at 2 p.m. "Landscaping 101" on Saturday, October 5 at 10 a.m. "Seed Gardening" on Saturday, October 5 at 2 p.m. "Flowering Cacti" on Sunday, October 6 at 11 a.m. "Bonsai ... an ancient art using desert plants" on Sunday, October 6 at 2 p.m. Announcements COMMUNITY GARDENS OF TUCSON. Start Fall gardening in a plot to suit your needs and a location near you and share seeds, plants and experience with other gardeners. $10 a month covers water costs. Call 795-8823 to reserve a plot.