If you want Sophora japonica to grow better, you should prune it in summer and winter respectively.

Pruning method

Summer pruning: summer is the most prosperous period of Robinia pseudoacacia. Pruning at this time is mainly to improve its tree shape and make it grow more ornamental. Summer pruning is also essential. This year, some drooping branches can be cut off, leaving only 1/4 or 1/3, which can promote the growth of its lateral buds and make the plants more lush. At the same time, prune too long branches to prevent their growth from consuming nutrients. You can also shorten the trunk, make the branches grow more and make other branches thicker. Winter pruning: It can be said that summer pruning is to make its rise more beautiful, while winter pruning shapes the overall tree shape. After all the leaves fall in winter, you can see the distribution of the whole branch more clearly. First of all, to adjust the growth of the main branches, we can bind them with hemp rope, artificially change their original shape and direction, weaken the too dense parts, and make the whole tree look more symmetrical. Old, weak, sick and disabled branches should be cut off. Generally, after pruning, the left part is thicker and rises better. After pruning, they should be burned or thrown away.