Can peony flowers be transplanted in spring?
As a representative of traditional famous flowers in China, the transplanting timing of peony directly affects its growth trend and flowering quality. Flower friends often ask whether the vernal equinox is suitable for transplanting, which requires scientific analysis based on plant growth characteristics and seasonal characteristics. Controversies and risks of spring transplanting of peonies. Sensitive characteristics of root recovery period. Peonies are in the root recovery stage in early spring, and new capillary roots germinate vigorously. At this time, transplantation may easily lead to the rupture of the absorbing roots, affecting the water and nutrient transport system, and causing a "dumb flower" phenomenon (flower buds cannot open normally). Experimental data showed that the flowering rate of transplanted plants in March decreased by 42% compared with autumn planting. Temperature fluctuations have a dual impact on the temperature difference between day and night in spring, which can reach more than 15℃. Newly transplanted plants must not only cope with sudden changes in temperature, but also adapt to the new soil environment. Under dual pressure, stress reactions such as wilting of new leaves and scorched of old leaves are prone to occur, and the recovery cycle is prolonged by 2-3 weeks compared with autumn. Scientific transplanting operation specifications The best time for selecting transplanting time should be the early stage of soil thawing (average daily temperature of 5-8℃), when the plant has not yet completely broken its dormancy. It should be completed in early March in the northern region, and in the southern region, it can be extended until around Jingzhe. It is necessary to ensure that the planting is completed 10 days before germination. When excavating with soil ball protection technology, keep complete soil balls with a diameter of 30-40cm and wrap them with straw ropes. The weight of the soil ball should account for more than 1/3 of the total weight of the plant, which can maximize the protection of the absorbing roots and maintain the original bacterial community environment. The principle of branch pruning is to retain 3-5 main branches for re-cutting, and remove thin and weak branches and crossing branches. The pruning amount is controlled to 2/3 of the original crown width, and Yushang cream is applied to the incision to prevent the invasion of bacteria. Simultaneously remove 80% of leaves to reduce transpiration consumption. Key points for post-transplanting maintenance are poured thoroughly with root-fixing water after transplanting, and then the soil is kept "dry and wet". Build a sunshade net (50% shading rate) in the first two weeks, and gradually increase the light after the new buds germinate. Phosphorus and potassium fertilizers are topdressing once a month, and EM bacterial solution is used to irrigate roots to promote root development.
Overall, peony transplantation should be preferred in late autumn and early winter. If spring planting is really needed, it is necessary to grasp the phenological nodes and take systematic protective measures. Through scientific management and refined operations, the transplant survival rate can be increased to more than 85%, laying the foundation for subsequent flower bud differentiation.