Russian knapweed identification and control
This Class B noxious weed has a limited distribution in Washington and control is required in King County. For more information on noxious weed regulations and definitions, see Noxious weed lists and laws.
Additional information on Russian knapweed
- Washington State Noxious Weed Control Board (external link)
- Selected Knapweeds of Washington (316 KB Acrobat file)
What to do if you find this plant in King County, Washington
Please notify us if you see Russian knapweed growing in King County. Our program staff can provide the property owner or appropriate public agency with site-specific advice on how best to remove it. Also, because Russian knapweed is not established in King County, we have an opportunity to stop it from spreading if we act quickly. We map all known locations of regulated noxious weeds such as Russian knapweed in order to help us and others locate new infestations in time to control them.
Report russian knapweed in King County, Washington
- Please notify us through our online infestation form
Locate russian knapweed in King County, Washington
- Use our interactive noxious weed map and search for russian knapweed