2. Three key stages of fertilization should be mastered, namely, topdressing in March to promote the growth of spring shoots and buds; Topdressing in June can promote the growth of secondary branches and improve drought resistance.
In March and June, basal fertilizer 10- 1 1 was applied to improve the cold resistance of plants and lay a good foundation for the growth of new shoots in the next spring. Garden cleaning is one of the effective measures to prevent and control diseases and insect pests and enhance tree vigor. Winter ploughing can eliminate overwintering pests.
4. Intertillage weeding should be carried out for 3- 15 times throughout the year, and the high temperature season in summer depends on the situation. When transplanting cold-resistant flowers, it is best to add 1/2- 1/3 cutting pine needles decomposed by 1 year to the garden soil.
5. Transplanting in June or March of the following year is prohibited in high temperature season. Water in the first month of transplanting: water regularly.
6. The amount of water usually depends on the change of seasons. Before and after the Qingming Festival, plants enter the period of growth and germination, and the amount of water should be gradually increased. After the new shoots stop growing (around the end of May), watering should be properly controlled to promote flower bud differentiation. June-July is the rainy season, so waterproof work should be done well.
7. In hot summer, you need to spray water on the leaves 2-3 times. Water spraying should be carried out in the early morning or evening. Don't spray water at noon, and don't pour cold water under the scorching sun, so as not to cause root system maladjustment and physiological defoliation.