Easily grown in average, medium moisture soils in full sun to part shade. Prefers moist, fertile, humusy soils which do not dry out. Cut plants to the ground in late winter. Best propagated by stem cuttings. This species generally grows better in open woodland areas than E. maculatum which generally likes moister soils.
Eutrochium purpureum, commonly called Joe Pye weed, is a tall Missouri native perennial that occurs in low moist ground, wooded slopes, wet meadows and thickets and stream margins throughout the State (Steyermark). It is an erect, clump-forming perennial which typically grows 4-7’ tall and features coarsely-serrated, lance-shaped, dark green leaves (to 12” long) in whorls of 3-4 on sturdy green stems with purplish leaf nodes. Tiny, vanilla-scented, dull pinkish-purple flowers in large, terminal, domed, compound inflorescences bloom in mid-summer to early fall. Each flower cluster typically has 5-7 florets. Flowers are very attractive to butterflies. Flowers give way to attractive seed heads which persist well into winter.
Genus name is derived from the Greek words eu meaning well and troche meaning wheel-like in reference to the whorled leaves.
Specific epithet means purple.