General Culture:
Grow in average, dry to medium moisture, well-drained soil in full sun. Probably will require staking or other support. Cut back after bloom and divide plants when clumps become overcrowded.
Noteworthy Characteristics:
This cultivar may be the tallest of the yarrows, growing up to 5' tall. A stiff, erect plant which features very large, mustard-yellow, plate-like, dense, terminal flower clusters (corymbs) up to 6" across and elegant, deeply-cut, fern-like, gray-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:
Broad, yellow flower heads with gray-green leaves provide color and contrast to the perennial border. This cultivar may be better utilized as a specimen than massed.
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Garden, 2001-2010