Eradicating Thistle

Asked November 18, 2019, 11:48 AM EST

Hello, I have a group of students willing to help me remove two patches of thistle on Wednesday. What is the best approach to this if we are trying to not have the thistle return in spring. Should we cover the area with cardboard to tarps after we remove thistle by hand? I believe we are dealing with bull thistle. Alison

Washington County Oregon

3 Responses

Thank you for your question, Alison. I know you’re on a tight timeline, but an accurate ID is important before proceeding. Could you compare your plant with the ones pictured in this article? https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/ec1288.pdf I can provide control info once you’re certain. Thanks!

Hi, It is definitely bull thistle.

Thanks! Here is an extensive article on available control methods for this pest: https://wric.ucdavis.edu/information/crop/natural%20areas/wr_C/Cirsium_vulgare.pdf Good luck!