Eupatorium fistulosum is a bold, tall perennial for moist gardens, pond margins, and naturalized meadows. You get thick, hollow stems topped with broad, domed clusters of many tiny blooms in midsummer through early fall, creating a soft haze of color and steady pollinator activity. As flowers fade, the seed heads often remain attractive into fall and can provide interest as the season winds down.

Place it where you have room: mature plants commonly reach 48-84 inches tall and about 24-48 inches wide, forming an upright clump. Grow it in full sun to part shade. In sunnier spots it tends to be taller and sturdier; in partial shade it can be a bit shorter while still flowering well. This plant performs best with consistently moist soil and tolerates occasional wet conditions, making it a strong choice for rain garden edges and areas that stay evenly watered.

For best results, water regularly during establishment and mulch to keep roots cool and soil moisture steady. Plant in rich loam if you have it, but it also adapts to clay or sandy soils as long as moisture is reliable. Give plants a few feet of spacing so air can move through the stems and so the clump has room to expand. Staking is rarely needed, but in windy sites a discreet support can help very tall stems stay upright.

Maintenance is simple. Cut stems back after hard frost or in late winter before new growth begins. You can also divide established clumps in spring if you want to manage size or share plants. Combine it with other moisture-loving natives and perennials for a layered look and a long season of garden interest.

Specifications

• Cold hardiness zone: 4-8 (-30 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
• Mature height: 48-84"
• Spread: 24-48"
• Tolerant of: Wet Conditions
• Attracts: Birds, Butterflies
• Native to the U.S.: Yes

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