This rhizomic, mat-forming and aggressive perennial frows to 2 feet tall and wide with ferny, finely-textured, green foliage. Flowers are produced in flat corymbs in early to late summer.
Noteworthy Characteristics:Naturalizing wildflower with numerous improved cultivars. Fairly vigorous, tough plant.
Care:Provide well-drained soil in full sun. Divide regularly to maintain vigor.
Propagation:Sow seed in situ or divide plant in spring.
Problems:Aphids, powdery mildew, rust.
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