How to cultivate Lagerstroemia indica

Lagerstroemia indica is a small tree with a long life. Its tree shape is not high, and it is often used as a garden ornamental tree and a street greening tree. Lagerstroemia indica has strong adaptability to the environment, drought resistance and cold resistance, and is not strict with soil requirements. The flowering period can be as long as 3 months. So how to cultivate Lagerstroemia indica? What are the maintenance points?

First, the cultivation method of Lagerstroemia indica

1, transplant. After defoliation in autumn and before germination in spring, seedlings can be transplanted with bare roots, and large seedlings need to be transplanted with soil balls. When planting, compost should be applied and irrigated twice to make it permeable, and then timely irrigation, loosening soil and weeding should be carried out. Lagerstroemia indica can be planted in spring with bare roots. Keep the root system intact when planting seedlings.

2. Planting site. The planting site should be sunny, moist and fertile loam with good drainage.

3. Water and fertilizer management. Apply sufficient base fertilizer before planting. The fertilizer can be decomposed human excrement and urine, manure, manure and compost. In the first three years after planting, 65,438+00 ~ 65,438+05 kg (mainly organic fertilizers such as compost and cake fertilizer) should be applied to the roots every winter or spring before germination, and some compound fertilizers can also be applied as appropriate.

The surviving Lagerstroemia indica is watered 1 time every spring, 3 ~ 4 times later and 1 ~ 2 times in flowering period. In North China, water with frozen water once before freezing, and pay attention to drainage after rain.

4, plastic trimming. The planted crape myrtle needs pruning. When planting larger Lagerstroemia indica, it should be pruned again before planting, and the trunk with uniform height can be set according to the cultivation needs, and all the upper crowns will be cut off to make the newly grown crowns grow vigorously and neatly.

During the growth of young Lagerstroemia indica, the lateral buds at the lower part of the stem should be pulled out at any time, so that the terminal buds and upper branches can get more nutrition, grow healthily and form a complete crown as soon as possible. During the growing season, the residual flowers and branches should be cut off in time to promote the development of new branches to prolong the flowering period, and the crape myrtle inflorescence opens at the top of the new branches. Prune long branches, twigs, diseased branches and dead branches after defoliation.

Second, the maintenance points of Lagerstroemia indica

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.

water

Lagerstroemia indica can resist drought and avoid waterlogging. You can water it once a year before germination in spring, freeze it once 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. Lighting equipment

The growth of Lagerstroemia indica needs sufficient light, otherwise there will be few or no flowers in flowering period, and what is more serious is that the whole plant will grow weak.

4. Temperature

The grown Lagerstroemia indica plants have strong cold resistance, but it is necessary to do a good job in cold protection and heat preservation of seedlings. After more than three years of cultivation, the heat preservation can be stopped.

5, fertilization

It is similar to watering time. Fertilize 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.

prune

Because 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-cutting and retraction of the annual branches, which is beneficial to concentrate nutrition and make 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. Pests

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