A correspondent wants to know whether this plant is a weed or garden perennial because it's spreading rapidly.
Seems familiar. Kind of reminds me of Shasta daisy--that would be a perennial and an invasive weed by my assessment. Hard to tell from that image.
I agree, hard to tell until the plant is more mature. I'm guessing the purple color is a response to cold temperature and maybe atypical for the plant as a whole. Leaf dentation seems to be rather subtle for Shasta daisy. Is some kind of goldenrod a possibility? Thanks. Bob