Paeonia 'Karl Rosenfield'

Paeonia 'Karl Rosenfield': Crimson Grandeur in Full Bloom

Bold and exuberant, Paeonia 'Karl Rosenfield' is a garden classic known for its vivid, double blooms in rich, ruby-red. The petals are lush and deeply layered, forming large, rose-like flowers with a hint of old-world drama. Blooming in early summer, it offers strong stems, glossy foliage, and a striking presence that continues to be cherished in both heritage and modern landscapes.

Plant Characteristics:

• Height: 85–95 cm
• Spread: 80–90 cm
• Flower Colour: Deep ruby-red; fully double with a classic rose form
• Flowering Period: Early to mid-summer
• Foliage: Dark green, glossy and upright with good seasonal presence
• Sunlight Requirements: Full sun to part shade
• Soil Requirements: Moist, fertile, well-drained soil; tolerant of clay with proper drainage

Uses and Benefits: Paeonia 'Karl Rosenfield' is a standout in traditional borders, cutting gardens, and foundation plantings. Its richly coloured blooms bring drama and formality, while its long lifespan and reliable performance make it a favourite for gardeners across Canada. The flowers are excellent for arrangements, and the plant’s upright, bushy habit ensures it holds its place among mixed perennial schemes. Its early summer bloom bridges the gap between spring bulbs and midsummer perennials with elegance and strength.

Companion Plants: Combine Paeonia 'Karl Rosenfield' with Salvia 'May Night', whose violet spikes add vertical contrast and attract pollinators throughout the season. Add Geranium 'Johnson's Blue' for its cool-toned, sprawling bloom that softens the peony’s intensity and fills in at ground level. Frame the planting with Miscanthus 'Gracillimus', a fine-textured ornamental grass that adds height, motion, and lasting seasonal structure.

Care Instructions: Plant in full sun for best flower production, though it will tolerate some afternoon shade. Position the crown just below soil level to ensure reliable blooming. Water deeply during dry spells and mulch to conserve moisture. Deadhead after flowering and cut stems back in late fall. Peonies are long-lived and best left undisturbed once established, though they can be divided in autumn if needed.

History: Paeonia 'Karl Rosenfield' was introduced in 1908 and remains one of the most popular red peonies in cultivation. Its rich colour, full form, and enduring performance have made it a perennial mainstay for over a century, gracing gardens with its bold charm year after year.

Final Thoughts: Regal and radiant, Paeonia 'Karl Rosenfield' brings enduring colour and traditional splendour to the garden—a true classic that never loses its impact.