Once we locate the weeds, we can work with landowners to control the problem. Introduced accidentally or as ornamentals in yards and gardens, noxious weeds spread quickly, displace desirable plant species and are extremely difficult to control. Noxious weeds can reduce crop yields, destroy native habitat, damage recreational opportunities, clog waterways, lower land values and even poison humans and livestock. Some of the major culprits in King County right now are Giant Hogweed, Gorse, Tansy Ragwort, Spotted Knapweed and Sulfur Cinquefoil. The weed program is currently monitoring more than 4,500 infestation sites of 39 species on the King County Noxious Weed List.
State law requires that landowners control noxious weeds on their property.
Through the weed control program, property owners are notified, given information on the weeds and suggestions for control methods. As authorized by state law, at least 16 Washington counties now have noxious weed assessments on their property tax bills so weed programs can have a dedicated source of funding. By visiting this and other King County web pages, you expressly agree to be bound by terms and conditions of the site.