I photographed this flower growing in one of the other plots at the community garden. There are so many fleabanes, I can’t say which one this is with absolute certainty, although I’ll guess daisy fleabane (Erigeron annuus).
I’ve come to this conclusion by the following logic: common fleabane (Erigeron philadelphicus) is a much shorter plant, and horseweed (Erigeron canadensis) has greenish-white flowers rather than pink. This according to my wildflower bible, “National Audubon Society Field Guide to Wildflowers Eastern Region“.