Celebrate the return of the trillium with a native plant sale, interactive learning stations & more. More information: tryonfriends.org/calendar/trillium-festival-1, www.facebook.com/FriendsofTryonCreek or 503-636-4398. Held at Tryon Creek State Natural Area.

Features a variety of rare, unusual & uncommon garden plants & seeds for the rockery or alpine garden. They include alpine plants but also hardy perennials, shrubs & other woodland plants. Cash or cheques only. Bring your own shopping bags. More information: www.agc-bc.ca, info@agc-bc.ca or president@agc-bc.ca. Held at VanDusen Botanical Garden's Floral Hall.