Green Thumb Garden Club: 7 p.m. the first Friday of the month. St. John the Baptist Church, 25810 156th Ave. S.E., Covington. 253-630-7674.

Lake Wilderness Arboretum: Events include: 10 a.m. the third Saturday of the month, docent tours; 9 a.m.-1 p.m. Saturdays, summer plant sales; 9 a.m.-noon Wednesdays-Thursdays and the first Saturday of the month, volunteer ddays. Forty-acre arboretum features trails for walking, jogging and bicycling, and the Smith-Mossman Garden’s collection of western azaleas. 22520 SE. 248th St., Maple Valley. Information: 425-413-2572 or www.lakewildernessarboretum.org.

WaterWise Demonstration Garden: Self-guided tours showcase plants and gardening methods that conserve water. Plant list available at garden or from Web site. Guided tours available for groups of 12 or more with advance registration. Hours: Dawn-dusk daily. Covington Water District, 18631 S.E. 300th Place, Covington. Information: 253-631-0565 (extension 170) and www.covingtonwater.com.