How to make crape myrtle grow faster
1, water. Lagerstroemia indica can be transplanted all year round, and the water supply of newly transplanted trees is the most important. The normally growing Lagerstroemia indica trees need water but can tolerate drought, so water management can ensure that the soil does not accumulate water and replenish water before germination and when the soil is dry in midsummer. When there is enough water in the early stage of growth, the leaves are large and full.
2, fat. (1) base fertilizer, with decomposed organic fertilizer and phosphorus and potassium fertilizer when transplanting. Phosphate fertilizer has low fluidity, long application duration as base fertilizer and high utilization rate. (2) topdressing. Lagerstroemia indica needs a lot of fertilizer. Every winter, deep ploughing and hole expanding are applied with organic fertilizer year by year, and cake fertilizer is the best. The quantity meets the requirement of ground diameter * 3kg. Preferably medium-boiled-outdoor blisters in Shanghai in winter 10 days. Other optional chicken manure and pig manure, the dosage is 3 times of cake fertilizer (Lagerstroemia indica with a diameter of 5 cm is applied 45 kg per year). Nitrogen, phosphorus and potassium fertilizer are applied in the growing season. At the early stage of growth, liquid fertilizer can be added.
3. gas. We have little ability to control the air. Sandy loam is suitable for soil to increase root respiration. Planting should be shallow. Lagerstroemia indica can absorb many harmful gases, but the planting area is mainly fresh air.
4. heat. Lagerstroemia indica likes heat. March 1-May1can be covered with plastic film to increase soil temperature and promote root growth. The lowest temperature in winter is less than MINUS 20 degrees Celsius, so we should do a good job of protection. The low temperature in Shanghai will not reach this limit, and everyone can spend the winter safely. Like other plants, when the temperature difference between day and night is large in spring and autumn, more nutrients are accumulated.
5.light. Need plenty of light. Lagerstroemia indica is a light-loving plant, which grows well in sunny conditions. It can grow under dark conditions, and it is easy to get sick, with few leaves and flowers.
6. soil. (1) pH, neutral soil is suitable. (2) Organic matter content, the soil organic matter content should be high, reaching 5% near the planting hole. Organic matter provides nutrients for Lagerstroemia indica growth, promotes the formation of soil aggregate structure, enhances fertilizer conservation performance and promotes the availability of soil nutrients. It is a regular work to continuously improve the content of soil organic matter in Lagerstroemia indica cultivation and management. The newly applied organic matter has a high annual mineralization rate and needs to be replenished continuously. When the soil quality of new earthwork is poor, chemical fertilizer can be applied to promote the growth of weeds, so as to improve the soil organic matter content. After two or three years of planting, this method can also be used to improve the content of soil organic matter. (3) The soil texture is sandy loam, and Lagerstroemia indica grows vigorously.
7, pests and diseases. (1) Pests, aphids, moths, scale insects and longicorn beetles. (2) Disease, when the growth is poor, the leaf spot defoliation is serious, and the control of powdery mildew on some trees is also very important. (3) Weeds are harmful and vines are not allowed to climb Lagerstroemia indica.
8. Trim. Pruning is not recommended. We generally believe that crape myrtle needs pruning now. At that time, like other cherry blossoms and begonia, it could not be pruned. It is uncertain whether cutting off residual flowers after flowering can improve its biological accumulation.
9. turn over the soil. Combined with fertilization in winter, the fallen leaves are turned into the soil. Increase the organic matter content of soil.
The above is the way to make Ziwei grow faster. Friends in need can learn about it and hope to help everyone.