Sawtooth Botanical Garden's Garden Tour: 3 to 6 p.m. in Hailey. Six gardens this year in Lane Ranch. Concludes with a cocktail party at 6 p.m. in the Lane Ranch Clubhouse. $45 general, $35 SBG members, $50 for membership and ticket. (208) 726-9358, sbgarden.org.
Worm composting: 7 p.m. at Idaho Botanical Garden, 2355 Old Penitentiary Road, Boise. Preregistration required by calling 343-8649 or go to idahobotanicalgarden.org.
Lakeside Lavender You-Cut Harvest: Noon to 4 p.m. at Lakeside Lavender Farm, 1003 W. Locust Lane, Nampa. $6 per you-cut bundle. lakesidelavender.com.
The Lavender Merchant Lavender Festival: 9 a.m. to 4 p.m. at 2871 Stroebel Road, Kuna. U-pick lavender, vendors, handmade lavender products, food, children's projects, and make-and-take activities. Free. 249-6483, thelavendermerchant.net.
Composting workshop: 6 p.m. at Boise Library Ustick branch, 7557 W. Ustick Road. Learn how to reduce waste and improve your garden's soil through home composting with staff from the Jim Hall Foothills Learning Center and a University of Idaho master composter. 570-6900.