Formerly Eupatorium coelestinum; Sun to light shade; Average to wet soils; Easy grow-anywhere plant that, in the wild, is usually found in damp sandy meadows. This plant spreads to form large patches which makes it useful if you have a large difficult area to plant. Flowers range from a muddy to a vibrant blue (rarely white). Grows 2-3' tall; Zone 5-10; WV ecotype