Blue mistflower, Wild ageratum, Conoclinium coelestinum (syn. Eupatorium coelestinum)

Blue mistflower, Wild ageratum, Conoclinium coelestinum (syn. Eupatorium coelestinum)

Blue mistflower, Wild ageratum, Conoclinium coelestinum (syn. Eupatorium coelestinum)

Scientific Name:

Conoclinium coelestinum (syn. Eupatorium coelestinum)

Common Name:

Blue mistflower, Wild ageratum

Scientific Name Pronounciation:

ah-no-CLIN-ee-um koh-uh-LES-tin-um

Plant Type:

Perennial

Plant Hardiness Zones:

5-10

Plant Hardiness Zone(s):

  • 5
  • 6
  • 7
  • 8
  • 9

Usual Size:

1-2'

Flower:

Terminal, flat-topped inflorescence can contain almost 70 individual blue-violet disk flowers (there are no ray flowers), each up to ½” across

Bloom Time Notes:

Late Summer to first frost

Leaf:

Opposite, ovate-to-triangular, hairy, and toothed along the edges

Fruit:

Seeds are black, tiny and elongated, with white hairs at one end

Wildlife:

Attractive to butterflies

Natural Habitat:

Sunlit wetlands and stream bank

Propagation:

Division, cutting or seed

Bloom Time:

  • Summer
  • Fall

Sun or Shade:

  • Sun

Companion Plants:

Cultural Notes:

Blue mistflower can spread vigorously both by rhizome and seed, forming large, dense clumps. To control re-seeding, plants should be cut back after blooming ends.  Pruning will also encourage a compact growth habit

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