When is the best pruning time for Lagerstroemia indica?

Pruning crape myrtle can be divided into two times a year.

After Lagerstroemia indica blooms in early summer, the branches that have already bloomed can still bloom again as long as they are trimmed in time. The pruning method is: cut it 20 cm below the ear, and new branches will grow at the upper end of the branches. Newly sprouted branches can grow into flower branches, which will sprout and blossom soon. It's just that the ears are not as big as the first flower. At this time, pruning must not be shortened, because plant growth has a top advantage, especially for plants entering flowering period, almost all nutrients are transported to the top of flower branches. Flowers and trees like Lagerstroemia indica are more than enough to see flowers without seeds. After cutting the ear, the remaining flowers of the flower branch will be nourished and supplied for the second time. Others, such as Chinese rose, can be pruned in this way after flowering.

The second pruning of Lagerstroemia indica can be carried out after winter. After winter, plants enter dormancy, and the juice flows slowly in the trunk and branches. Then trim it, which will help the wound heal. Lagerstroemia indica should not be pruned in spring. Even in the early spring weather, people have not felt the breath of spring, but the roots of plants have ended their dormant period and started to absorb and transport water and nutrients, and new leaves can not germinate, which does not mean that plants have not started to grow. Pruning in spring not only affects the healing of incision, but also affects the germination and growth of leaf buds and flower buds.

The flowering characteristic of Lagerstroemia indica is that it blooms at the top of new branches in that year, and the growth order is to grow and develop branches first, and then it can bloom in the form of buds after the branch growth period is completed. The growth length of flower branches is not only restricted by water and fertilizer, but also the pruning degree is the most critical factor. Four Lagerstroemia indica strains were tested and compared, and different pruning parts were adopted. One is to cut off the crown and keep only the trunk. The second is to keep the trunk and completely cut off the side branches from the bottom. The third is to cut off more than two-thirds of the side branches in that year. The fourth is to cut off only a few branches under the ear.