Unknown weed #648814 - Ask Extension

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Unknown weed #648814

Asked June 10, 2020, 12:05 PM EDT

Please advise the proper name of this persistent weed. Is it part of the Knapp weed family? Thank you

Marion County Oregon

Expert Response

Thank you for contacting us with your weed question. I believe you have a bull thistle (Cirsium vulgare), a biennial weed. The flattish rosette is first-year growth. In the second year, the plant develops a tall stalk before flowering.

This weed is controlled by pulling or cutting repeatedly until the root dies from being deprived of energy from photosynthesis. 


Lynne Marie Sullivan Replied June 10, 2020, 10:12 PM EDT

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