Conoclinium coelestinum, commonly called mistflower, is a late summer to fall-blooming herbaceous perennial that is native to the Eastern United States. It looks like annual ageratum and in that regard is sometimes commonly called hardy ageratum.
Best flower production takes full sun, which needs more watering during the hottest time of the year.
An ideal soil would be made up of 45% minerals (sand, clay, silt), 5 % organic (plant and animal) material, 25% air and 25% water. The mineral portion would be loam (20 – 30% clay, 30 – 50% silt and 30 – 50% sand).
Cut back any dead stems in late winter, and if the plants overwinter without dying back, cut them to ground level, as they will resprout from underground stems called rhizomes.
