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Noxious weeds

King County, Washington

To offer a suggestion or report an error on the King County Noxious Weeds website, please contact Sasha Shaw, education specialist.

Weed control practices

Galerucella beetle collection in Eastern WAThe King County Noxious Weed Control Program practices Integrated Pest Management policies. Controlling noxious weeds depends on the plant and the site. How you control a handful of new tansy ragwort plants by your mailbox will require a different technique than removing 10 acres of tansy ragwort spread throughout a pasture.

To help landowners choose the best control method for their weeds on their sites, the noxious weed program has developed several handouts. Best Management Practices (BMP's) give specific control recommendations and guidelines, including plant identification tips and impacts. Biological controls, such as insects or grazing mammals, are sometimes used for large, widespread weed infestations.

Please follow these links to learn more about:

For site-specific weed control recommendations, please contact the noxious weed program at 206-477-WEED (206-477-9333) or by email.

Related information

Related agencies


Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333).