Commonly called mistflower, this late summer to fall-blooming herbaceous perennial is native to the Eastern United States and is a part of the aster family (Asteraceae). It looks like the annual ageratum and in that regard is sometimes commonly called hardy ageratum. It is a showy native plant that is found in the coastal plain growing along roadsides on moist ditch banks. Under cultivation, it becomes a choice perennial with 8 weeks of blue flowers from late summer until frost. It is nectar-rich and pollinators love it.

This plant prefers moist humusy soils that do not dry out in full sun to partial shade areas.