Eupatorium coelestinum, commonly called mistflower, is a late summer to fall-blooming herbaceous perennial that is native to the Eastern United States. It looks like annual ageratum and in that regard is sometimes commonly called hardy ageratum. But it is perennial and can spread aggressively by rhizomes.
Type: Herbaceous perennial
Family: Asteraceae
Native Range: Central and southeastern United States, West Indies
Zone: 5 to 10
Height: 1.50 to 3.00 feet
Spread: 1.50 to 3.00 feet
Bloom Time: July to October
Bloom Description: Blue
Sun: Full sun to part shade
Water: Medium
Maintenance: Medium
Suggested Use: Naturalize
Flower: Showy
Attracts: Butterflies