General Culture:
Easily grown in average, dry to medium, well-drained soil in full sun. May need staking or other support. Cut back after bloom and divide plants when clumps become overcrowded.
Noteworthy Characteristics:
A stiff, erect plant which features yellow, plate-like, dense, terminal flower clusters (corymbs) and elegant, deeply-cut, fern-like, deep green leaves. Foliage has a spicy odor when crushed. Good cut or dried flower. Tolerant of summer heat and humidity. Drought tolerant once established. Long summer bloom period may be extended by prompt removal of faded flower heads.
Problems: Click for detailed list of pests and problems.
Powdery mildew, rust and stem rot are infrequent problems. Does poorly in wet sites or in heavy, poorly drained soil.
Uses:
Provides color and contrast to the perennial border.
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Garden, 2001-2010