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Conoclinium coelestinum
Also called Mistflower, Blue Boneset, Blue Mist Flower, Perennial Ageratum
Blue mistflower is a North American herbaceous perennial with fluffy clusters of blue to lavender flowers in late summer and fall. It likes consistently moist soil and spreads readily, so give it room or contain it.
Conoclinium coelestinum, commonly known as blue mistflower, mistflower, wild ageratum, or blue boneset, is a North American species of herbaceous perennial flowering plant in the family Asteraceae. It was formerly classified in the genus Eupatorium, but phylogenetic analyses in the late 20th century research indicated that that genus should be split, and the species was reclassified in Conoclinium.
C. coelestinum is native to eastern and central North America, from Texas to the west, Illinois to the north, the east coast to the east, and Florida to the south. It has been introduced in New York, Michigan, and Ontario. This species prefers moist soils and can be found in wood edges, sandy woodlands and clearings, wet meadows and stream banks. It can thrive in a variety of light conditions ranging from shade to full sun.
Blue mistflower is often grown as a garden plant, although tends to spread and take over a garden. It is recommended for habitat restoration within its native range, especially in wet soils.
Betonyleaf thoroughwort · Palmleaf Thoroughwort · Conoclinium mayfieldii · Thoroughwort
Text excerpted from the Wikipedia article Conoclinium coelestinum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
