Many dates from late April to July. Controlling over 20 species of noxious weeds is one of our toughest stewardship duties. Timing of weed control treatments depends on stage of plant growth and favorable weather conditions so we keep a flexible schedule. Many projects involve using backpack sprayers and a few rely on mowing with string-trimmers and hand-pulling. Please contact Olivia Schilling, Stewardship and Trails Assistant at [email protected] or (509) 667-9708 to get on our Weed Warriors list so you can receive emails on upcoming volunteer opportunities for weed control.