Hollow Joe Pye Weed (Eutrochium fistulosum), also known as Trumpetweed or Purple Thoroughwort, is a robust, herbaceous perennial native to eastern North America. It typically grows between 4 to 7 feet tall, forming upright clumps with hollow, green stems that may display purple spots or streaks. The lance-shaped leaves, up to 10 inches long, are arranged in whorls of 3 to 5 along the stems. From mid-summer to early fall (July to September), this plant produces large, domed clusters of small, fragrant, pinkish-lavender flowers that are highly attractive to butterflies, bees, and other pollinators.
Thriving in full sun to partial shade, Hollow Joe Pye Weed prefers moist, fertile, well-drained to seasonally wet soils. It is commonly found in natural habitats such as wet meadows, marshes, and along stream banks. Hardy in USDA Zones 4 through 9, this species is well-suited for rain gardens, pollinator gardens, and naturalized areas. Due to its height, providing ample space and, in some cases, staking may be necessary to support the tall stems.
Ecologically, Eutrochium fistulosum plays a significant role in supporting wildlife. Its nectar-rich flowers attract a variety of pollinators, including butterflies, bees, and hummingbirds. Additionally, it serves as a larval host plant for several moth species, such as the Clymene moth (Haploa clymene), the Eupatorium borer moth (Carmenta bassiformis), the ruby tiger moth (Phragmatobia fuliginosa), and the three-lined flower moth (Schinia trifascia). The seeds are also consumed by songbirds, adding to the plant’s ecological value.
