Digging time: The best time to dig the mountain pile of Cotinus coggygria is early spring, before germination. In fact, it can be excavated during the dormant period from autumn defoliation to spring germination. At this stage, the root system has the most nutrients and small transpiration, which avoids a lot of water loss and ensures the survival rate.
2. Selection of culture soil: In general, pure sandy soil is selected as the nutrient soil for embryo in-situ culture, and it is planted in a flowerpot two years later. If there is no arable land, you can also choose purple sand pots and pottery pots with good air permeability and use plain sand as nutrient soil for cultivation.
3. Pruning before planting: keep as many fine roots as possible, cut off old roots, rotten roots and long roots, and avoid roots curled up in the soil, which is not conducive to rooting. The wound can be treated with bactericide, or it can be dried in the shade and dipped in rooting powder before planting.
4. Planting method: The planting depth should be consistent with the topsoil and rhizomes, so as to avoid over-planting, and let the roots straighten naturally, which is beneficial to the generation of new roots. After planting, water, compact the soil, cover with a plastic film, and keep warm and moist.
5. Post-planting maintenance: cover the above-ground parts with plastic bags to increase air humidity and reduce water evaporation. Shade cotinus coggygria and pile it downhill to keep the soil moist and prevent water accumulation in potted plants. After survival, gradually increase the amount of light and water for daily maintenance.
The downhill piles in the first year need careful maintenance in high temperature season. Shading treatment is needed in midsummer season to prevent wilting. Don't wait until the hot season to dry, otherwise it will affect the growth. Potassium dihydrogen phosphate can be sprayed on the leaves for many times to supplement phosphorus and potassium fertilizer, so as to prevent and control pests and diseases in time.
In the second year, we can carry out plastic pruning, cut off too many sprouting branches, weak branches and too dense branches, and carry out necessary branch treatment according to the shape of pile foundation under the mountain to form a natural bonsai shape.