Western Yarrow
Synonyms: Achillea millefolium var.
occidentalis | A. millefolium var. lanulosa
A perennial with leaves finely divided with gray woolly hairs; flowers are white, in dense, flat-topped cluster; plants are aromatic. Quite drought tolerant. Blooms from June through July. Native from Quebec to Yukon, south to OK, CA and Mexico on dry, open rocky places. Prefers full sun; well-draining soils. Very drought tolerant; will be aggressive in moister soils, spreads by rhizomes.
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