knapweed poisoning

Asked February 10, 2014, 1:11 PM EST

Can you tell me if dried knapweed in hay is toxic or as toxic as the green plant is? Should I be concerned about feeding hay with it in it?

Hampshire County Massachusetts

1 Response

I can find no literature that differentiates between fresh and dry knapweed, so I would assume it is toxic when dried. There are several different knapweeds, and russian knapweed is not common in the eastern U.S.More information can be found at