Alphabetical Plant Listing

Conoclinium coelestinum (Blue Mistflower)

Blue Mistflower, Wild Ageratum, Hardy Ageratum, Blue Boneset, Eupatorium coelestinum


Conoclinium coelestinum (Blue Mistflower) is an upright, spreading perennial boasting an abundance of small, fluffy, bright blue or violet flowers held in flat clusters in midsummer to late fall. The ageratum-like blossoms are carried atop purplish stems and attract impressive numbers of bees and butterflies. They grow above the dense foliage of coarsely-toothed, somewhat triangular, bright green leaves. Native to the central and southeastern United States, Blue Mistflower adds color to the late season garden when many other plants are starting to fade. However, this wildflower spreads quickly and can become a nuisance. Great as a colonizing groundcover in moist natural landscapes or for erosion control.

  • Grows up to 18-36 in. tall and wide (45-90 cm). Can spread aggressively by rhizomes and self-seeding.
  • Performs best in moist, fertile, humus-rich, well-drained soils in full sun to part shade.
  • Great for wild flower gardens, prairies and meadows, or along streams and ponds.
  • No significant pest or disease issues. Keep an eye out for powdery mildew. Tall plants may be cut back in summer to prevent flopping.
  • Propagate by root division or by seed. Sow seeds in fall or provide cold stratification. Can also be propagated by softwood cuttings taken in late spring.
  • Native to the central and southeastern United States, West Indies.

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Requirements

Hardiness 5 – 10
Plant Type Perennials
Plant Family Eupatorium - Joe-Pye Weeds
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Fall
Height 1' – 3' (30cm – 90cm)
Spread 1' – 3' (30cm – 90cm)
Spacing 36" (90cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy
Native Plants United States, Midwest, Illinois, Indiana, Kansas, Michigan, Missouri, Nebraska, Ohio, Northeast, Delaware, Maryland, New Jersey, New York, Pennsylvania, Southeast, Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma, Texas
Attracts Birds, Butterflies
Garden Uses Ground Covers, Ponds and Streams
Garden Styles Informal and Cottage, Prairie and Meadow

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By Matt Hopkins, Joseph Potter, Shutterstock

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 5 – 10
Plant Type Perennials
Plant Family Eupatorium - Joe-Pye Weeds
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Fall
Height 1' – 3' (30cm – 90cm)
Spread 1' – 3' (30cm – 90cm)
Spacing 36" (90cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy
Native Plants United States, Midwest, Illinois, Indiana, Kansas, Michigan, Missouri, Nebraska, Ohio, Northeast, Delaware, Maryland, New Jersey, New York, Pennsylvania, Southeast, Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma, Texas
Attracts Birds, Butterflies
Garden Uses Ground Covers, Ponds and Streams
Garden Styles Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Eupatorium - Joe-Pye Weeds

Guides with Eupatorium - Joe-Pye Weeds

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