Eupatorium coelestinum 'Cori' (Conoclinum) - BLUE MISTFLOWER 'CORI' (robust, vital, dark stems)

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Also called Conoclinum coelestinum 'Cori' - robust vegetative propagated cultivar with light blue flowers, reddish-brown stems. Very vital selection that grows into 2.5' tall and 3' wide and dense clumps. Slow to emerge in the spring (late April).

This perennial spreads by underground rhizomes, so leave some more space for it, or let it naturalize.

Can be used wildflower garden, pollinator gardens,naturalized areas, along water bodies, erosion control, in open woodland garden and in flower borders (where spreading roots will not interfere with other plants).

Good perennial companions can be native or nativars of Aster, Lobelia siphilitica, Solidago, Rudbeckia fulgida,Vernonia or introduced Rodgersia, big Hosta, Polygonatum.


Blooming time : September to October

Size : usually about 2.5’ tall x 3’ wide

USDA zones : 5 to 9

Culture : sun, half shade, dappled shade, average soil, clay, organic rich.

Moisture Needs : prefers more moisture in soil, but is quite adaptable and grows well in average moist soil, moist and wet soil

Origin : wild species is native to the Eastern United States – can be found in wet woods, at bluff bases, along streams, ponds and moist ditches. See distribution on the USDA map.

Deer/rabbit resistant : yes/yes

Attracts Butterflies or Pollinators : long-tongued bees, butterflies, and skippers, also other small insects (small native bees and beetles)

Attracts Hummingbirds : no

Pot Size : square 3.5“ x 5“ deep pot