As May draws to a close, a dramatic transformation unfolds in gardens across the temperate world. Buds that stood tight, waxy, and guarded by ants suddenly surrender to an explosion of silk and fragrance. For approximately three weeks, the peony reigns supreme, offering a level of botanical opulence that feels more akin to a Dutch Golden Age masterpiece than a standard perennial border. While their season is fleeting, the peony’s impact is unparalleled, connecting modern gardeners to a horticultural legacy spanning two millennia.
A Cultivated History: From Imperial Courts to Modern Borders
The peony’s journey began in China, where Paeonia lactiflora was prized for its medicinal utility before transitioning into a symbol of wealth and feminine grace during the Tang Dynasty. For centuries, the tree peony (Paeonia suffruticosa) was a protected treasure of the imperial court, its possession a definitive mark of social standing. When these plants reached Europe and Britain in the 18th and 19th centuries, they sparked a “garden passion” that saw French and English nurserymen—such as Calot and Lemoine—developing hybrids that remain industry benchmarks today. To plant a peony is not merely to garden; it is to join a centuries-old global conversation.
Navigating the Cultivars: Herbaceous, Tree, and Itoh
Understanding the distinct categories is essential for selecting the right plant for your landscape:
- Herbaceous Peonies: The most common variety, these die back to the ground in autumn and emerge with red-tipped shoots in spring. They are incredibly long-lived and offer the widest range of fragrance and form.
- Tree Peonies: These deciduous shrubs possess permanent woody stems, reaching up to two meters. They flower earlier than herbaceous types and produce some of the most spectacular, large-scale blooms in the plant kingdom.
- Itoh (Intersectional) Peonies: A 1948 breakthrough by breeder Toichi Itoh, these hybrids combine the hardiness of herbaceous types with the exotic colors—including yellows and corals—of tree peonies.
Decoding Flower Forms
When sourcing varieties from specialists like Kelways or Claire Austin Hardy Plants, you will encounter specific terminology regarding bloom structure:
- Single & Japanese: Simplest forms featuring a central boss of golden stamens; excellent for naturalistic designs.
- Semi-Double & Double: The “classic” peony. Doubles, such as the iconic apple-blossom pink ‘Sarah Bernhardt’ or the lemony white ‘Duchesse de Nemours’, provide the heavy, ruffled “bomb” shape favored for wedding bouquets.
- Anemone & Bomb: These offer a “flower-within-a-flower” effect, with dense centers that create architectural interest.
The Secrets to Cultivation Success
While peonies have a reputation for being temperamental, their requirements are simply non-negotiable.
The Golden Rule of Planting Depth
The most frequent cause of “blindness” (failure to flower) is improper planting. Herbaceous peonies must have their “eyes” (buds) no more than 2.5cm below the soil surface. Conversely, tree peonies are grafted and need to be planted deeply—15cm below the surface—to encourage the upper plant to develop its own root system.
Site and Support
Peonies thrive in deep, fertile loam with excellent drainage. Full sun is preferred, though light afternoon shade can extend the life of the blooms. Given the sheer weight of double-flowered varieties, peony rings or supports should be placed in April before the foliage fully unfurls. Staking after the buds have developed often results in an ungainly, forced appearance.
Maintenance and Health
To prevent Peony Blight (Botrytis), scrupulously clear away all dead foliage in the autumn. While ants are often seen on buds, they are harmlessly feeding on sugary secretions and do not damage the plant. For those seeking to extend the season, selecting a mix of early-blooming species (like ‘Molly the Witch’) and late-season lactifloras can provide color from late April through early July.
Why We Wait for the Peony
The peony is an exercise in patience. It requires years to establish and offers only a brief window of glory. Yet, it remains essentially unrivaled. Whether it is the saturated crimson of ‘Karl Rosenfield’ or the shifting apricot tones of the Itoh ‘Kopper Kettle’, these flowers deliver a sensory experience that justifies every effort. They represent the peak of summer’s promise—a fleeting, fragrant reminder of the beauty found in transience.