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bull thistle plant 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).

Additional bull thistle photos - please click on a thumbnail for larger image.

bull thistle rosette - click for larger image bull thistle flower - click for larger image
 
Please direct questions & comments regarding noxious weeds to Program Staff, King County Noxious Weed Control Program.

For questions about the
Water and Land Resources Web Site, please contact Fred Bentler, webmaster.



Department of Natural Resources and Parks
Water and Land Resources Division

Updated: October 15, 2007

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