To offer a suggestion or report an error on the Water and Land Resources' Web site, please contact Fred Bentler, webmaster.
This Class C noxious weed is recommended but not required for control in King County.
For information on identification, impacts and control, please download the Bull Thistle Weed Alert (178 KB, Adobe Acrobat format, 26 sec).
For detailed information on background, biology and spread and control methods, please see the Bull Thistle King County Best Management Practices (234 Kb Adobe Acrobat format, 34 seconds).
Bull thistle photos - please click on a thumbnail for larger image.
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 C noxious weed is recommended but not required for control in King County.
