“Tansy is on Minnesota's "control" noxious weed list, which means efforts are supposed to be made to control its spread, but there aren't really any programs in place to make that happen, let alone eradicate it.”

https://www.minnesotawildflowers.info/flower/common-tansy

It appears that I should eliminate it as it is an invasive species. I do like it better than the 10 other invasive species in that same garden bed though.