Pruning the branches and leaves of Sophora japonica can further adjust the rational distribution of nutrients, inhibit excessive growth, promote flower bud differentiation, blossom and bear fruit early, prolong the full flowering and bearing period, rejuvenate the old tree and improve its ornamental value.

Pruning time of Sophora japonica

Black locust trees are usually pruned best before the end of winter and spring, and can be pruned in other seasons, but don't prune too much. Pruning is usually about 3 times a year, in summer, autumn and winter.

Pruning propagation of Sophora japonica

Black Sophora japonica is best pruned and propagated in spring. At this time, the temperature is suitable and the air humidity is high, which is suitable for rooting and sprouting.

Pruning method of Robinia pseudoacacia

1. When Sophora japonica is planted as a street tree, it generally adopts the shape of a multi-channel trunk with a plastic belt of about 2.5 meters. After young trees are planted, management should be strengthened to promote robust germination, and backbone branches should be cultivated on this basis.

2. When pruning in summer, 4-6 branches with vigorous growth and good azimuth should be selected in the plastic belt, and the tender tips of the remaining branches can be pinched off. When pruning in winter, 3-4 main branches should be selected and cut about 80 cm according to the growth situation. If the growth is not enough, the top can be lightly cut or invisible.

3. When Sophora japonica is used as a street tree, it sometimes encounters wires, which hinders the development of trees to high altitude. You can choose 3-5 thick, evenly distributed and obliquely growing branches as the main branches by the shape of a happy character, and cut off the rest. The tips of the main branches of street trees should be neat, and the remaining main branches should be cut short at last.

Matters needing attention in pruning Robinia pseudoacacia

After Robinia pseudoacacia is gradually formed, branches can be thinned in winter, such as rotating branches, clustered branches, thinning branches, branches with pests and diseases, too dense branches, dry branches and so on. , reduce the occurrence of pests and diseases. After each pruning, it should be kept in a ventilated place and provide astigmatism.