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This Class B weed has a limited distribution in Washington; control in King County is required.
For more information about perennial sowthistle, please follow this link to the WA State Noxious Weed Control Board.
If you find perennial sowthistle in King County, please notify us through our online infestation form.
To find out where we have records of this weed in King County, use our interactive noxious weed map and search for perennial sowthistle.
Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact a staff member at the King County Noxious Weed Control Program, please call 206-296-0290 or by reach them by email.
This Class B weed has a limited distribution in Washington; control in King County is required. 
for perennial sowthistle.