King County Iris Society Bearded and Beardless Iris Show: Noon-5 p.m. May 17. Admission: Free. Crossroads Shopping Center, at the corner of Northeast Eighth Street and 156th Avenue Northeast, Bellevue. www.KCIS.org.
Rhododendron Show and Sale: 10 a.m.-5 p.m. May 17; 10 a.m.-4 p.m. May 18. Proceeds benefit the Cascade Rhododendron Society. Bellevue Botanical Garden, 12001 Main St. 425-333-6178.
Bellevue Botanical Gardens: 1 p.m. June 14, free Plant ID tour. Garden includes 36 acres of perennial borders, Japanese, Waterwise, ground cover and alpine rock gardens and trails through native woodland and wetland areas. Free tours, 2 p.m. Saturdays-Sundays, April through October. Hours: Dawn-dusk daily. Visitors’ center hours: 9 a.m.-4 p.m. Cost: Free. 12001 Main St., Bellevue. 425-451-3755 or www.bellevuebotanical.org.
King County Master Gardener Foundation talks: All talks at 10:30 a.m. Topics: May 17, “Apple Maggot and Coddling Moth”; May 31, “Shade Gardening”; June 7, “Lady Beetles”; June 14, “Lavenders”; June 21, “Garden Mistakes.” Cost: Free. 15500 S.E. 16th St., Bellevue. 425-452-7225.
Bellevue Nursery Master Gardener Clinics: 11 a.m.-3 p.m. Saturdays-Sundays through September. Master Gardeners will be on hand to answer gardening questions. Bellevue Nursery, 842 104th Ave. S.E. 425-454-5531 or www.bellevuenursery.com.