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Conoclinium coelestinum

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Plant types and subtypes: Perennials, Ground Covers

Light Requirements: sun, part-sun, part-shade

Water Use: medium

Soil Moisture: moist

Soil Description: average, loam, clay, sand

Height: 2'-3'

Bloom Time: August, September, October

Bloom Color: violet, lavender, blue

Leaf Color: green

Hardiness Zone: 5, 6, 7, 8, 9, 10

Additional Tags: attracts bees, attracts birds, attracts butterflies, colonizing, cottage garden plant, fall interest, naturalizing, pond margin plant, stream margin plant

Flower of Conoclinium coelestinum (blue mistflower)
  • Flower of Conoclinium coelestinum (blue mistflower)
  • Flower of Conoclinium coelestinum (blue mistflower)
  • Flower of Conoclinium coelestinum (blue mistflower)

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Description

Conoclinium coelestinum

Also known as:

blue mistflower

,

wild ageratum

,

hardy ageratum

,

blue boneset

,

pink eupatorium

Scientific Synonyms:

Eupatorium coelestinum

Description

Conoclinium coelestinum is an all around attractive plant with leathery, mint-like leaves with prominent veins. It can grow to a height of 3' and is topped off by several 3" clusters of lavender flowers. These give way to tufted achenes that allow the seeds to be dispersed by the wind.

Cultivation

Blue mistflower is very easy to grow, and adaptable to typical garden conditions. It prefers bright locations, but will tolerate part shade. Moist, well drained soil is best. It has a rhizomatous root system, and can spread aggressively, particularly if the soil is very rich and consistently on the wet side. It is a prolific bloomer and will add intense color to the garden for up to 2 months, beginning in mid to late summer and extending until mid fall or first frost. Zones 4-10

Propagation

Easy to propagate from seed, or by root division in mid spring.

Additional Notes

Conoclinium coelestinum can be aggressive, but the amount of color it provides to the late season garden is well worth it. It is also an excellent food source for pollinators. Until recently, it was classified as Eupatorium coelestinum.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:
AL, AR, DC, DE, FL, GA, IL, IN, KS, KY, LA, MD, MI, MO, MS, NC, NE, NJ, NY, OH, OK, PA, SC, TN, TX, VA, WV

Classification

Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Magnoliopsida Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae Aster family
Genus Conoclinium thoroughwort
Species Conoclinium coelestinum blue mistflower