Easily grown in average, medium to wet soils in full sun. Prefers rich, moist soils. Intolerant of dry soils. Avoid overfertilization, which may cause plants to grow too tall. Although not required, plants may be cut back in May-early June to reduce plant height and to encourage branching, thus leading to a more floriferous bloom, healthier foliage and less need for support. Remove spent flowers to encourage additional bloom. Cut back plants by 1/2 after flowering. Divide clumps as needed (every 3-4 years) to maintain vigor.
Noteworthy Characteristics
Helenium flexuosum, commonly called purple-headed sneezeweed, is most easily distinguished from other sneezeweeds by its spherical, brownish-purple center disk. It is an erect, clump-forming perennial that is native to the eastern and midwestern U.S.