What I call a "Frost Aster," like most flowers, has many common names. Some of them are Awl Aster, Frostweed, Hairy White Old Field Aster, Hairy Aster, and White Heath Aster. The accepted name currently is "Old Field Aster" in English and Aster poilu in French. The Latin too has changes recently. The correct name is now Symphyotrichum pilosum.
Whatever one calls it, it is blooming now. I think it is a bit late this year but perhaps it will bloom later too, to make up for the slow start.