Paeonia lactiflora 'Karl Rosenfield' is a classic herbaceous peony valued for its huge, fully double, ruby-red flowers and sturdy habit. You will enjoy a bold late-spring show, plus handsome green foliage that stays attractive well after bloom.
Plant it where you can give it full sun for maximum flowering, or light/afternoon shade in hotter areas. Provide deep, fertile, well-drained soil and steady moisture in spring as shoots and buds develop, then water during dry spells once established.
For best performance, set crowns so the buds sit shallowly below the soil surface; planting too deep or too much shade can reduce blooms. Many double-flowered peonies benefit from support, especially after rain, so plan for a ring or stakes early in the season.
After flowering, remove spent blooms and let foliage feed the roots through summer. Divide or move plants in fall if needed, and give this long-lived perennial time to settle in for years of dependable cut-worthy flowers.