Can crape myrtle for roadside greening be potted?

Ziwei can be potted. Lagerstroemia indica trees are graceful, with bright green leaves and red flowers in summer and autumn, and the flowering period can exceed 100 days. In order to make potted Osmunda japonica bloom more brightly and more frequently, in addition to selecting dwarf varieties, measures such as plastic pruning and fertilizer and water management must be strengthened to adjust the flowering period.

Choose one-year-old strong seedlings for potted plants or direct seeding in spring. Potted Lagerstroemia indica needs dwarfing, and pruning is the key to promote more and more flowering. After the seedlings are planted in the pot, they should be aired at a place 15-20 cm above the ground, and the seedlings should be topped when they grow to about 15 cm. After axillary buds sprout new branches on the trunk, choose three strong branches in different directions as the main branches, and wipe or cut off the rest. When the main branch grows to 8- 10 cm, the core is removed to inhibit the extension of growth, promote the growth of lateral branches, and cultivate a compact, low, natural and happy crown.

Lagerstroemia indica has strong germination ability and is extremely resistant to pruning. Pruning is generally carried out in the growth period and winter dormancy period. The main purpose of pruning is to adjust the tree structure, promote multi-branching, multi-flowering, multi-flowering, old tree renewal and prolong flowering period, and achieve short trunk, low branches, uniform and compact growth, pleasant crown, ventilation and light transmission.

Lagerstroemia indica flower buds form quickly, and rotating pruning can promote multi-branches and multi-flowers. After the flowers wither in autumn and winter, they should be pruned vigorously to remove dense branches, overlapping branches, long branches, dead branches in the cavity and branches with pests and diseases. Re-cut the main side branches, lengthen the branches and compress the old branches, so that more branches can sprout and bloom in early spring. When the new shoots grow from 10 cm to 15 cm in spring, leave 8 cm to 10 cm for coring, concentrate nutrients, promote branching, and increase the amount of flowers and branches.

From the end of May to the first half of June, after the first flowering, cut off the upper part of the flower branches, leaving strong seedlings, so that the lower axillary buds germinate and regenerate new buds. It blooms for the second time from mid-late July to early August. Cut off the residual flowers in time after the flowers wither, accumulate nutrition and promote the differentiation of new branches and flower buds. It can bloom for the third time from late August to early September.

In this way, several rounds of pruning are repeated, and the fertilizer is increased accordingly. Apply 1-2 times a month during the growth period, and increase the amount of fertilizer after flowering. In full bloom from July to September, liquid fertilizer was applied every 7- 10 days, and 0.2% potassium dihydrogen phosphate was sprayed on the leaves every 10- 15 days.

After each flower withers, cut off the residual flowers at any time to prevent fruit hanging and reduce the consumption of nutrients.