GARDENING Events This Week PROTECTING PLANTS FROM SUMMER SUN AND HEAT. Pima County Cooperative Extension. 4210 N. Campbell Ave. Learn about how the climatic elements affect your plants on Wednesday, May 22 at 9 a.m. (repeated at Wilmot Library at 1 p.m.). Free demonstrations and advice on gardening. Call 626-5161 for details. Upcoming PAIN-FREE HORTICULTURE CLASSES. Arthritis Foundation Office. 616 North Country Club Road. 520-917-7070. Don't give up the pleasures of tending your own garden just because of arthritis pain. Gardening and flower arranging maintains joint flexibility. Join the Tucson Botanical Gardens staff on the last Tuesday of the month from 10 a.m. to 11:15 a.m. for a $3 horticulture class. For details call 917-7070.

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