Spring Plant Sale - Boyce Thompson Arboretum, 37615 U.S. Highway 60, Superior. Most of the plants available for purchase during the event are grown by arboretum horticultural staff in the arboretum's own nurseries. 8 a.m.-5 p.m. March 24. Free with park admission. 1-520-689-2811.
Arts and Crafts Show - Next to The Gaslight Theatre, 7004 E. Broadway. 9 a.m.-6 p.m. March 24. Free. 886-4116.
Tucson Cactus & Succulent Society & the Green Valley Gardening Club Host Spring Expo - Green Valley Continental Shopping Center, 180 W. Continental Road, Green Valley. The expo will include short lectures, plant sales and displays, including books, pots, sculptures, cacti and succulents. 9 a.m.-3 p.m. March 24. Free. 256-2447.
Shade Survivors - Harlow Gardens, 5620 E. Pima St. Shady spots in the garden can be difficult to plant. We have some good solutions to share with you. 2-3 p.m. March 24. Free. 298-3303.
Growdown! The Great Tucson Garden Design Challenge and Award Ceremony - Tucson Botanical Gardens, 2150 N. Alvernon Way. Four local landscape designers will go trowel to trowel in a three-day competition to transform an empty plot into "the best" pocket garden. Winners will be announced at a luncheon with Mary Irish. Luncheon is noon to 1:30 p.m. March 24. Challenge free with garden admission. $50 luncheon. 326-9686, Ext. 10.
Old Pueblo Gourd Patch - Mountain Avenue Church of Christ, 2848 N. Mountain Ave. Meetings are held on the final Monday of each month and are open to all gourd artists, growers and enthusiasts. Our March meeting will feature one of our members who will demonstrate "Choosing and Using Feathers." 6-8 p.m. March 25. Free. 573-1793.
Sit and Knit - Kirk-Bear Canyon Library, 8959 E. Tanque Verde Road. All levels invited to knit and crochet. 1-3 p.m. Tuesdays. Free. 594-5275.
Ezy 8 Tai Chi - OASIS at Junior League, 2099 E. River Road. Learn safe exercises that can be done at home. Class 230. Age 50 and older; registration required. 2-3 p.m. $39; $12 one-time registration fee. 322-5627.
Voyager RV Resort Market Daze - Voyager RV Resort, 8701 S. Kolb Road. Hundreds of arts, crafts, jewelry, food, beauty products, clothing and gift items. 9 a.m.-1 p.m. second and fourth Wednesdays. Free. 574-6100.
Green Valley Gardeners Seminar Series: Butterflies With Fred Heath - Green Valley Recreation Center's Desert Hills, 2980 S. Camino del Sol, Green Valley. 9:30-10:30 a.m. March 28. Free. 207-7691.
Yarnivores - Murphy-Wilmot Library, 530 N. Wilmot Road. Brown-bag dinner group devoted to the yarn arts. Bring your dinner. Bring a project. Don't forget the yarn. 6 p.m. Thursdays. Free. 594-5420.
Dewdrop Arts & Crafts Fair - Safeway, southeast corner of Swan Road and Sunrise Drive. Paintings, pottery, jewelry and metalwork by local artists. 9 a.m.-5 p.m. March 29-30; 10 a.m.-4 p.m. March 31. Free. 488-5780.
Friday Fun Knitters - Foothills Mall, 7401 N. La Cholla Blvd. Knitters of any skill level are welcome. Meet at the food court. 10 a.m. Fridays. Free. 293-0781.
Urban Yarns @ the Library - Joel D. Valdez Main Library, 101 N. Stone Ave. Meet fellow fiber fanatics, peruse the library's latest fiber-themed books and find inspiration for your next project. 11 a.m.-1 p.m. Fridays. Free. 791-4010.
Small Space Vegetable Gardening - Harlow Gardens, 5620 E. Pima St. Live in an apartment? Have a small patio? You can have a vegetable garden, too. 2-3 p.m. March 29. Free. 298-3303.