GARDENING Events This Week ROSES FOR FALL PLANTING. Pima County Cooperative Extension. 4210 N. Campbell Ave. Free gardening demonstrations offer tips on planting and care on Wednesday, October 2 at 9 a.m. (repeated at 1 p.m. at Wilmot Library). Call 626-5161 for details. Upcoming HYDROPONIC GARDENERS. UA Agri-Farm Greenhouse. 2031 E. Roger Road. This group meets at noon the second Saturday of every month. Call Bob at 327-8822 or Jo at 751-1005 for information. 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.