Karl Rosenfield Double Peony (Paeonia hybrid 'Karl Rosenfield')

The Karl Rosenfield Double Peony (Paeonia lactiflora 'Karl Rosenfield') is a classic herbaceous peony cultivar that is widely grown for its large, showy, double blooms. The flowers are deep crimson-red in color and can reach up to 6 inches in diameter. They have a sweet fragrance and are often used in floral arrangements.

Karl Rosenfield Peonies typically bloom in late spring to early summer and have a long flowering period of up to two weeks. The plant itself can grow up to 3 feet tall and wide and has dark green foliage that remains attractive even after the flowers have faded.

These peonies are relatively easy to grow and require full sun to partial shade and well-drained soil that is rich in organic matter. They also require regular watering during dry periods. With proper care, Karl Rosenfield Peonies can live for many years and become a stunning focal point in any garden.

One thing to note is that Karl Rosenfield Peonies may require staking or support as the weight of the blooms can cause the stems to bend or break. You can use bamboo stakes or other supports to prop up the stems and prevent damage.

Characteristics:

Flowers: 'Karl Rosenfield' peony produces stunning, fully double flowers with a rich, vibrant magenta or deep crimson color. The blooms are often described as bomb-type or rose-shaped, with layers of densely packed petals.

Foliage: The foliage of 'Karl Rosenfield' is lush green and deeply lobed, providing an attractive backdrop for the flowers. The leaves emerge in spring and remain verdant throughout the growing season.

Size: This peony cultivar typically forms a clump reaching a height of about 2 to 3 feet (60 to 90 cm) and spreads to a similar width. The sturdy stems hold the heavy blooms upright, even in windy conditions.

Blooming Season: 'Karl Rosenfield' peony blooms in late spring to early summer, usually around May or June, depending on the climate and growing conditions. The flowers are long-lasting and make excellent cut flowers.

Environmental Requirements:

Sunlight: Plant 'Karl Rosenfield' peony in a location that receives full sun to partial shade. While it can tolerate some shade, it typically produces the best blooms in full sun.

Soil: Peonies prefer well-draining soil with good fertility. Amend heavy or clay soils with compost or organic matter to improve drainage and provide essential nutrients.

Watering: Keep the soil consistently moist, especially during the first growing season after planting. Once established, peonies are relatively drought tolerant but benefit from regular watering during dry spells.

Mulching: Apply a layer of organic mulch around the base of the plant to conserve soil moisture, suppress weeds, and regulate soil temperature. Keep the mulch several inches away from the stems to prevent rotting.

Support: 'Karl Rosenfield' peony flowers can be heavy, so it's advisable to provide support for the plants to prevent them from flopping over. Use peony rings or stakes to support the stems and keep the flowers upright.

Deadheading: Remove spent flowers promptly to encourage the plant to put energy into producing more blooms and prevent seed formation.

Division: Over time, peonies can become overcrowded, leading to reduced flowering. Divide clumps every 5 to 7 years in early fall to rejuvenate the plants and maintain vigor.

'Karl Rosenfield' peony is a classic garden favorite cherished for its stunning blooms, rich color, and reliability. It's an excellent choice for perennial borders, cottage gardens, and cut flower arrangements, adding beauty and elegance to any landscape.