1, high pressure, that is, high altitude layering, is a propagation method with a survival rate equivalent to that of ramets, and the most suitable time for high pressure propagation is May-August. When the pressure is high, select strong branches for annular peeling, and then wrap the peeling place with plastic wrap with soil matrix. When the roots grow out, they can be transplanted into pots.

2. Stratification time. Generally speaking, the best time for high-pressure propagation is from late May to mid-August every year, and the climate temperature during this period is most suitable for branches to take root, especially from July to August, when the root system grows most rapidly.

3. The ring is peeling. When layering at high altitude, it is best to choose healthy branches with tree age 1 ~ 2 years and peel them into rings where roots are expected to grow. The peeling length is about twice the diameter of the branch, which can expose the wooden part of the branch.

4. Deal with branches. Wrap the peeled part of the branch with plastic wrap or plastic bottle, put wet soil or water moss and other substrates for root growth, then wrap it tightly and fix it into a cylinder with a rope.

5. Maintenance and rooting. After the high-altitude layering is completed, put the plants in the sun for maintenance. Usually, the drying and wetting degree of the substrate at the packaging place is observed. If it is too dry, fill it with water with a syringe. Of course, you can also untie the tied rope and fasten it after watering.

6. Transplanted into a pot, generally after 1 ~ 2 months, roots will grow at the place where the ring is peeled. First, cut the branches from the bottom where the roots grow, then remove the wrapped plastic wrap or bottle, and finally plant the soil in a new pot soil. After planting, you should move to a cool place to take the pot and then maintain it normally.