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Eupatorium coelestinum (hardy ageratum, blue mistflower)
Species Distribution Map: Click to enlarge
Map Color Key © 2013 BONAP

Eupatorium coelestinum

hardy ageratum, blue mistflower

(syn. Conoclinium coelestinum)

Fuzzy blue flowers atop attractive red stems, in September and October, make great cut flowers. This plant can be aggressive in Southern gardens. Found in old fields, meadows, and along stream banks. Naturalizes readily.

Eupatorium coelestinum LP50 - 50 per flat Availability
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2-3 Feet


2 Feet


12 Inches

Bloom Color


USDA Hardiness Zone 6-11

hardy ageratum, blue mistflower Interesting Notes

Mistflower is a fast spreading perennial which creates a soft drift of fuzzy blue button-like flower heads for five full weeks in fall. This plant grows best in moist, well drained soil and will spread rapidly to form large masses. Plants can grow 2-3’ tall. It grows best in full sun to part shade. The blossoms of mistflower brighten the garden from September through October producing a lovely contrast in the late season garden. There are many companions that bloom at the same time and require similar culture including Lobelia siphiliticaSolidago rugosa ‘Fireworks’, Symphyotrichum novae-angliaeSymphyotrichum laeve var. laeve ‘Bluebird’, Rudbeckia fulgida and Vernonia noveboracensis. - Mt. Cuba Center

Eupatorium coelestinum Growing and Maintenance Tips

Moist soil; sun to partial shade; found in moist woods, thickets, and along stream banks.

Key Characteristics & Attributes

Deer Resistant
Deer Resistant
Full Sun
Full Sun
Full Shade
Full Shade
Part Sun
Part Sun
Cut Flower
Cut Flower

Additional Information

Season of Interest (Flowering)
Late Summer
Plug Type
Landscape Plug™
Propagation Type
Open pollinated
Moist Shade
Native to North America
Erosion Control
Moist Sun