Lindsay from Brampton, Ontario Canada writes
Tenacity Herbicide is not labeled for coltsfoot. You can see the article below from Washington State where they have done studies on the plant and the recommendations for control. There do not appear to be any herbicides specifically labeled for this weed currently. Coltsfoot Weed https://www.nwcb.wa.gov/weeds/european-coltsfoot
Answer last updated on: 08/17/2020
