Astrantia major 'Roma'

Common name: masterwort
Type:
Herbaceous perennial
USDA hardiness zones:
4-7

Roma' is an upright, umbelliferous, stoloniferous, clump-forming masterwort that typically grows to 20-25î tall. Flowers are arranged in compound umbels. Each pincushion-like umbel of rose-red florets is subtended by a showy ruff of papery, horizontal, petal-like, light silver-pink involucral bracts. Bracts usually remain attractive well after bloom. Flowers bloom from late spring to mid-summer on stems rising well above the basal clump of foliage. Leaves are medium green, with each leaf being palmately cut into five doubly serrate lobes. 'Roma' is the product of a planned breeding program in... more »

  • Part shade
  • Medium to wet
  • Medium

Best grown in organically rich, medium to wet, well-drained soils in part shade. Soils must be kept uniformly moist and not allowed to dry out. Best performance occurs in cool summer climates where night temperatures consistently dip below 70F degrees, which unfortunately is a cultural preference that does not fit the profile of a typical St. Louis summer where this plant often labors. In optimum growing conditions, plants may spread by stolons. 'Roma' is a patented plant that does not produce seed.

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