Eupatorium coelestinum (Blue Mistflower) is an easy, pollinator-loving native perennial that fills the late-season garden with clouds of fuzzy, blue-purple blooms. You will get the best flowering and sturdier stems in full sun, but it also performs well in part shade where the color can be especially luminous.

Plan for a mature size around 24-36 inches tall with a similar spread. This plant likes consistently moist, humus-rich soil and is a strong choice for rain gardens, pond edges, low spots, and other sites that stay evenly damp. It tolerates periodic wet conditions better than many perennials, but it does not like being baked dry for long stretches.

Blue Mistflower spreads by rhizomes and can also self-seed, so it is ideal for naturalized plantings, meadow-style borders, and pollinator beds where you want it to knit together. In smaller gardens, give it a defined space and be ready to thin or divide clumps to keep it where you want it. Cutting stems back in spring can help reduce flopping and encourage a fuller habit.

From mid- to late summer into fall, the nectar-rich flowers draw butterflies and other beneficial pollinators, and the plant can add valuable late-season color when many other blooms are fading. Pair it with other moisture-tolerant natives and late bloomers for a long-lasting, wildlife-friendly display.

Specifications

• Cold hardiness zone: 6-10 (-10 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Growth rate: Fast
• Mature height: 24-36"
• Spread: 24-36"
• Tolerant of: Deer, Wet Conditions
• Attracts: Butterflies
• Long bloom time: Yes
• Native to the U.S.: Yes

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