Planting and Management: Choose loose, fertile, neutral to slightly alkaline soil. Before planting, prune the peony seedlings, removing broken and diseased roots, and treat the roots with an insecticide and fungicide. When planting, spread the roots naturally, cover the seedling with soil to two-thirds of the container or planting hole, then gently lift the seedling to ensure full contact between the roots and soil. Firm the soil around the seedling, ensuring the rootstock is slightly below ground level.
Water and Fertilizer Management: Water thoroughly immediately after planting. Peonies are not tolerant of waterlogging; during the growing season, irrigate appropriately according to soil moisture. In arid northern regions, ensure three key irrigations: pre-flowering, post-flowering, and pre-freezing. Potted peonies can be buried in the ground after flowering for easier management.
One year after planting, apply well-rotted organic fertilizer in autumn, using broadcasting or hole application combined with soil loosening. During the spring and summer growing season, use chemical fertilizers, applying them in conjunction with irrigation for pre-flowering and post-flowering topdressing. Potted peonies can be fertilized with liquid fertilizer during irrigation.
Pruning and Shaping: In the first year after planting, pruning should primarily involve coppicing. After spring budding, retain about 5 strong branches and promptly remove excess buds to concentrate nutrients and ensure high-quality flowering the following year. In autumn and winter, during garden cleanup, prune away spent flower stalks, weak branches, and branches without flowers. Potted peonies can be individually shaped and pruned according to desired aesthetic preferences.
Field Management: During the growing season, timely weeding and cultivation are necessary, and pest and disease occurrence should be closely monitored. For peony plants older than two years, deep tilling of the garden soil should be carried out in autumn and winter.
After 3-4 years of growth, potted peonies should be transplanted into larger containers with fresh potting soil in autumn, or divided and transplanted.
Plant Protection Measures: Spray lime sulfur solution before early spring budding for prevention. In summer, based on the occurrence patterns of pests and diseases, alternate between using a mixture of insecticides and fungicides every two weeks. Chemical fertilizers and growth regulators can be added when fertilizing.
Flowering Period Control
To meet the demand for flowers during festivals, heating treatment can begin 50 days in advance, maintaining an ambient temperature between 10-25℃ and an average daily temperature of around 15℃. In the early stages, focus on keeping the plants moist. After bud formation, improve ventilation and light penetration. Once the buds have formed, precisely control the temperature according to the target flowering period. During management, foliar fertilization and ensuring adequate water supply can achieve continuous flowering in both winter and spring.
Ornamental Maintenance
The natural flowering period of a single peony plant is approximately 10-15 days. Higher temperatures will shorten the flowering period accordingly. In an environment of 3-8℃, the flowering period can be extended to one month. For outdoor cultivation, the viewing period can be extended by constructing a shade structure. Potted plants should be moved to an environment without direct sunlight, with a temperature of 5-10℃ and good ventilation. Water as needed according to the plant's condition and soil moisture, avoiding direct watering of the flowers to maximize the lifespan of individual flowers. When cultivating cut flowers, the cut ends of the branches should be trimmed in water or scorched. Preservatives or a small amount of sucrose can be added to the water to extend the vase life.
