Boneset (Eupatorium perfoliatum) | Prairie Restorations

Boneset

Eupatorium perfoliatum

Boneset is a perennial herb that grows 2 to 4 feet tall, characterized by its unique perfoliate leaves—opposite leaves that join around the stem, giving the appearance that the stem perforates them. It produces clusters of small, white, fuzzy flowers from July to October. Commonly found in moist fields, meadows, and along shores, it prefers moist to wet soils and full sun. Historically, it was used in traditional medicine to treat fevers and other ailments, earning the name "boneset" for its use in treating "breakbone fever." In landscapes, it is valuable for wetland gardens, naturalized areas, and pollinator gardens, attracting a variety of insects.

Characteristics

Product Form	Plant, Seed
Type	Forb
Sun	Full Sun, Partial Sun
Soil	Clay, Loam, Sand/Gravel, Peat, Calcareous
Moisture	Mesic, Wet
Average Max Height (inches)	40
Suggested Plant Spacing (inches)	24
Bloom month(s)	July, August, September, October
Bloom Color or Type	White
Dominance	Medium

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.