Eupatorium coelestinum

Hardy Ageratum, Mist Flower, Thoroughwort

Blooming in late summer and early fall, this large group of perennials, herbs, and shrubs provides color when other plants have stopped flowering. Several species are cold-hardy wildflowers native to the eastern United States. These have whorled leaves and showy, small flowers in clusters. Start by seed or division. Pinch back during the growing season to encourage fuller growth and more flowers.
Eupatorium coelestinum, Hardy Ageratum, Mist Flower, Thoroughwort
One of the best late, blue-blooming perennials, it looks like a tall Annual Ageratum. White-flowered 'Alba' is also available. Can be invasive. Leaf miner is a problem. Plant with Asters and Chrysanthemums.

Attributes - Eupatorium coelestinum

Plant Type: Perennial

Bloom Season: Late Summer through Mid Fall

Flower Color: Blue

Foliage: Deciduous

Height: 1 ft. to 3 ft.

Width: 2 ft.

Sunlight: Full Sun, Partial Sun

Climate: Zones 5, 6, 7, 8, 9

Notes: Thrives in Wet Soil. Cut Flowers. Susceptible to Aphids, Powdery Mildew.

Related Plants

Eupatorium maculatum 'Gateway', Eupatorium purpureum, Eupatorium sordidum
 
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