Garden calendar | A listing of garden events, classes and sales.

Highlights of this week's garden events.

Grow more in a small space

THU, SAT Intensive two-day workshop for people who want to maximize the use of their small garden plots; preregistration required. 6:30- 9 p.m. Thursday, 10 a.m.- 2:30 p.m. Saturday, Bradner Gardens Park, 1733 Bradner Place S., Seattle; $75-$85 (206-633-0451 or www.seattletilth.org).

Spring nursery pot recycling day

SAT For any retail plastic pots that are free of soil, leaves and debris, 9 a.m.-4 p.m., Molbak's, 13625 N.E. 175th St., Woodinville; free (425-483-5000 or www.molbaks.com).

Tantalizing tomatoes

SAT Discover secrets for growing colorful, luscious and flavorful tomatoes this summer, 11 a.m., City People's Garden Store, 2939 E. Madison, Seattle; free (206-324-0737 or www.citypeoples.com/gardenstore).

American Rhododendron Society show and sale

SAT-SUN More than 200 rhododendron hybrids, species and azaleas. Sale, 10 a.m.-5 p.m. Saturday, 10 a.m.-4 p.m. Sunday; show, noon-5 p.m. Saturday, 10 a.m.-4 p.m. Sunday, Bellevue Botanical Gardens, 12001 Main St., Bellevue; (206-755-6827 or www.arscascade.org).

Water features for wildlife

MAY 21 Discover ways to provide water for urban wildlife, including birds and amphibians; preregistration required, 7-9:30 p.m., Woodland Park Zoo (ARC Building), 5500 Phinney Ave., Seattle; $15-$20 (206-548-2424 or www.zoo.org).