1. Propagation methods of peony flowers: The propagation methods of peony include branching method, grafting method, cutting method, layering method, sowing method and tissue culture method. The most common propagation methods are plant division and grafting. Before the first frost in autumn, the whole tree of peony, which has been growing for 4-5 years, is dug out for ramet cultivation.
2. Preparation of culture soil. The cultivated soil should be loose, slightly acidic, neutral or slightly alkaline, with good drainage and water holding capacity. The culture soil for potted peony flowers consists of 40% compost, 35% garden soil and 25% coarse sand.
Third, we should choose a ceramic cylinder, barrel or earthen basin with a suitable size, and we can't use a ceramic basin.
4. Selection and treatment of cultivated varieties, such as Luoyanghong, Er Qiao and Zhao Fen. Strong adaptability, good flower pattern, grafting with peony as rootstock. Dig out the transplanted seedlings, air dry the roots for 1-2 days, and then put them into the pot. When the roots are soft, cut off dead branches and excessively long damaged roots, disinfect them with 1% copper sulfate solution for 5 minutes, and then put them into a pot.
5. Cultivation, usually in autumn (September-65438+1October). Put broken tiles on the bottom of the flowerpot, then fill in the culture soil, and then put the peony plants in the center of the flowerpot to stand upright, with the roots stretched. Fill half of the flowerpot with soil, gently lift and shake the peony plants, and compact the cultivated soil. Don't plant it too deep, just keep the root and the mouth of the flowerpot flat. Shallow affects the survival, and deep affects the growth of peony after transplantation. Water it once after planting. After cultivation, it should be maintained in a cool environment for one week, and then moved to the sunny place after the root system is restored.
Six, water and fertilizer management, peony loves fertilization. Spraying liquid fertilizer 1-2 times on leaves in early spring, spraying liquid fertilizer 1-2 times after flowering and spraying compound fertilizer once in summer. Water is generally enough to keep the soil moist. Water it every night in summer, but don't do it in winter.
Seven, plastic trimming. Pruning is an important technical measure for peony flower cultivation. From the second year after planting, between the spring equinox and Tomb-Sweeping Day every year, many new buds germinate in the root neck. When the new buds are 5-6 cm long, select 3-5 new branches with strong growth and uniform distribution from each cluster, and remove the rest by hand or knife, and wipe off the unused buds, leaving only the terminal buds. If the terminal bud is poorly developed, replace it with a complete lateral bud at the top.
When pruning, we should pay attention to the height and posture of the plant cluster, pick out the core or cut off the tip of the prominent long branches to make them commensurate with the height of other branches, and make up the crown space with side branches. It is also necessary to dilute the fine buds and cut off the residual flowers after the flowers have withered. In autumn, remove the sprouts that have not been erased in time in spring, and leave 3-5 stems per plant. Inward branches, cross-parallel branches, excessively dense slender branches and harmful branches all need to be dealt with in time. If you encounter cool sunshine during flowering, you should shade yourself, and a simple and sparse shade shed has the best effect. In areas with severe cold in winter, it is necessary to cultivate or cover the soil for winter. According to the size of the basin, the number of main tributaries should be determined. Generally speaking, it is not advisable to leave more branches, but about 4 branches are appropriate.
Eight, potted peony, especially to prevent peony flowers from rotting roots and falling buds. The preventive measures are that the soil in the pot must be loose and breathable, and the water and fertilization should be timely and appropriate. Only when it is dry, water it to avoid water accumulation in the flowerpot. In addition to applying sufficient fertilizer, topdressing should be thin and small. Bud, germinate, core and drain in time, so that the crown is ventilated and transparent. In areas with severe cold in winter, you should enter the house at the right time. Early spring prevents late frost and cold.