Second, the cultivation techniques and methods of oil peony:
1, planting.
Choose a place with sunshine and no water, preferably sunny slopes, sandy loam, rich peony and good drainage. Before planting, dig deep into the ground, the planting pit should be appropriately large, and the peony root should be stretched vertically when it is placed in its hole, and it is not allowed to take root by punching holes. Don't plant too deep, it's best to just bury the roots. Generally, there are fewer potted plants.
2. Light and temperature.
Adequate sunshine is beneficial to its growth, but it is not resistant to summer sun. The temperature above 25℃ will make the plant dormant. The optimum flowering temperature is 17 -20℃, but it must be treated at low temperature of 1-10℃ for 2 -3 months before flowering. The lowest temperature is -30℃, but appropriate cold-proof measures should be taken in winter in the northern cold area to avoid freezing injury.
The high temperature and high humidity weather in the south is extremely unfavorable to the growth of peony. Therefore, in order to enjoy the beauty of peony flowers in the south, we must give specific environmental conditions.
3. Water and fertilize.
Water twice before planting. Irrigation 1 time before winter to ensure its safe overwintering. After spring, water should be supplied according to the dry and wet conditions of the soil, but don't water it too much. Generally, fertilizer is applied three times a year, and the first time is 1 time before flowering, and quick-acting fertilizer is applied to promote flowers to bloom well.
The second time is fertilization after flowering, and the topdressing is 1 times of organic liquid fertilizer. The third time is autumn and winter fertilizer, mainly base fertilizer, to promote the growth of the next spring. In addition, attention should be paid to intertillage weeding, and the soil can be loosened by shallow tillage without leaving weeds.
4, plastic trimming.
Pick and trim the flowers in time after they wither, and trim them according to the natural growth of the tree. At the same time, a layer of calluses antiseptic film is attached to the trimming mouth to protect the wound and prevent the invasion and infection of germs. If you want plants to be low and have dense flowers, you should cut them short to inhibit branch expansion and tillering. Generally, it is advisable to leave 5-6 branches per plant.
5. Flowering period control.
Potted peony can promote flowers in winter and bloom in the Spring Festival. The method is to select peony varieties with full scales and buds (such as Zhao Fen, Luoyanghong, Lu Shengdan, Gejinzi, Cinnabar Cup, Dazihu, Mokui, Wulong Peng Sheng and so on). ) 60 days before the Spring Festival, take it out with soil to minimize root damage, dry it in the shade for 12-3 days, and then put it on a basin for shaping and pruning.
Leave 10 branches with full terminal buds per plant, leave terminal buds, and erase the remaining buds. When placing the flowerpot, the size of the flowerpot should match the plant to achieve a satisfactory plant type. After pouring water, it is managed normally. 50-60 days before the Spring Festival, move into a greenhouse around 10℃, and spray water 2-3 times a day to keep it moist. When the scale buds swell, gradually heat them to 25-30℃, and the temperature at night is not lower than 15℃, so that flowers can be seen in the Spring Festival.