Run your fingers through those silky, deep crimson petals and you’ll understand why Karl Rosenfield has been a garden staple for over a century. This classic herbaceous peony produces large, fully double blooms in late spring to early summer — flowers so lush they practically ask to be cut and brought indoors.
Plant yours in full to part sun in fertile, well-drained soil, and take care not to bury the eyes more than an inch or two below the surface — depth is the most common reason peonies refuse to bloom. Hardy in USDA zones 3–8, Karl Rosenfield grows into a tidy, self-supporting clump reaching 24–36 inches tall and wide. Cut stems back after the first hard frost in fall. Each passing year rewards you with a more abundant show than the last.
Available for Fall 2026 or Spring 2027 shipping at the same price — choose whichever season fits your planting plans.
🍂 Shipping & planting window
Peonies ship in fall (September–November) when fully dormant and bare root.
Fall planting gives roots a full season to establish in warm soil before winter. Cold stratification triggers strong, healthy spring growth and reliable bloom production. Spring-shipped peonies experience root damage during active growth, transplant shock during their bloom cycle, and often lose an entire growing season.
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