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This Class B noxious weed has a limited distribution in Washington and control is required in King County.
For more information about brown knapweed, please see the written findings of the WA State Noxious Weed Control Board.
The Selected Knapweeds of Washington is a an informative color brochure describing knapweeds. (316 KB Acrobat file, 46 seconds on 56K modem).
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 noxious weed has a limited distribution in Washington and control is required in King County.