Answer: Astrantia, or Masterwort, is a shrubby perennial with leafy stems that grow 2 1/2' n- 3' tall. It thrives in sunny or partly shady spots, in moist, rich soil. Astrantia produces flowers in dense, tight clusters surrounded by papery bracts. The plant is hardy from zones 3-8 (you're in zone 6). Astrantia is easy to care for; its only requirement is ample moisture during the summer. The bloom season is summer through autumn.
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