common name:
Blue Mistflower, Hardy Ageratum
|
scientific name:
Conoclinium
coelestinum
Blue mistflower (Conoclinium coelestinum) produces soft, fuzzy clusters of blue to lavender blooms that are highly attractive to pollinators in late summer and fall. Photo taken August 27, 2025 in the Backyard Farmer Garden.
Image Creadit:
Trey Lamkins, Graduate Research Assistant
Blue mistflower (Conoclinium coelestinum) is a native herbaceous perennial known for its soft, fluffy clusters of blue to lavender flowers that appear in late summer through fall. These blooms provide a critical nectar source for pollinators, especially butterflies and migrating species, making it a standout plant in pollinator-focused landscapes. This species spreads readily by rhizomes, often forming dense colonies in moist soils, particularly along streambanks, low areas, and rain gardens.
Charecteristics
Plant type:
Herbaceous perennial
Hardiness Zones:
5a, 5b, 6a, 7, 8
Light Needs:
Full Sun
Water Needs:
Moist
Space Requirements:
3–6 feet
Height Requirements:
2–4 feet
Spread Requirements:
3–4 feet
Bloom Color:
Lavender
Bloom Time:
Summer
Leaf Color:
Green
Wildlife Attraction:
Butterflies
Companion Plant Tolerance:
Wet Soil
Uses:
Rain Garden
Varieties