Variety Origin: Bred by American breeder Sass in 1933. Belongs to the herbaceous peony Lactiflora Group. Registered with the American Peony Society (APS). Named after gardening enthusiast Marietta Sisson. A classic late-flowering variety from the 20th century.
Core Characteristics: Stems are resilient and upright, requiring no support. Foliage is dark green and glossy. Late flowering season (late May to early June).
Cultivation Performance: Adaptable to USDA zones 3-8 (tolerates -34°C). Prefers full sun and well-drained, fertile, neutral to slightly acidic soil. Best planted in autumn (September-October). Strong stress resistance, low maintenance. Suitable for cut flowers, border planting, garden specimen planting, and specialty garden collections.
Marietta Sisson peony is a classic late-flowering, highly fragrant peony. Its full flower form and warm color, combined with broad cultivation adaptability, offer both ornamental value and practical attributes, making it an excellent choice for extending the peony season.
