Cultivation method of Lagerstroemia speciosa: cultivation method of Lagerstroemia speciosa.

1, soil: Lagerstroemia indica has strong environmental adaptability and can be applied to general cultivated soil. If conditions permit, you can choose deep and fertile sandy soil for cultivation, which is most conducive to the growth of Lagerstroemia indica.

1. Watering: Lagerstroemia indica can resist drought and avoid waterlogging. You can water it once a year before germination in spring, once with frozen water after defoliation in autumn, and pay attention to "no watering" at other times. Water in spring drought 1-3 times; Drainage should be done well in rainy season to avoid root rot caused by accumulated water; There is generally no need to water in autumn.

3. Illumination: The growth of Lagerstroemia indica needs sufficient illumination, otherwise there will be few flowers or no flowers in the flowering period, and more seriously, the whole plant will grow weak.

4. Temperature: The grown Lagerstroemia indica plants have strong cold resistance, but the cold protection and heat preservation of seedlings must be done well. After more than three years of cultivation, the heat preservation can be stopped.

5. Fertilization: similar to watering time, fertilization is once before germination in spring and once after defoliation in autumn. It can be smeared with human excrement or sesame sauce residue, which can promote the growth of plants in the coming year to be more vigorous and the flowering period to be more lush and bright.

6. Pruning: Since the inflorescence of Lagerstroemia indica is planted at the top of the new branches in that year, it is necessary to pay attention to the re-pruning and retraction of the annual branches, which is conducive to concentrating nutrition and making the branches grow stronger. Long branches, drooping branches, pests and diseases, dead branches, slender branches, endogenous branches, etc. should be cut off, and the side branches at the lower end of the plant trunk should be cut off in time during the young tree period to reduce the consumption of nutrients and ensure the formation of a good crown on the upper part of the plant trunk.

7. Insect pests: Lagerstroemia indica is easily infected by insect pests such as scale insects, yellow thorn moths and giant salamander moths, and measures such as spraying drugs should be taken in time to prevent and control it.