1, select a tree. Platanus acerifolia has straight trunks and branches, and usually has a wide natural crown. When making street trees, the shape is generally cup-shaped. If there is no overhead line on it, you can be happy. When making shade trees, they are mainly naturally straight or multi-branched. 2, plastic trimming.

In the winter of the following year, the stem was fixed, the tip was cut off at the height of 3~3.5m, and the side branches on the trunk below the branch point were cut off. In the third year, after the seedlings germinate, 3~5 strong branches near the branches are selected as the main branches, and the rest are cut off in batches. In winter, leave 50~80cm short sections on the main branches, and leave the cut buds on the side to make them as horizontal as possible. After germination in the second spring, choose 2 pieces each.

The third-level lateral branches grow obliquely, that is, they form the shape of "three branches, six forks and twelve branches". After 3-4 years of cultivation, the breast diameter of the big seedlings is 7-8 cm, which has been initially cup-shaped and meets the standards of street trees, so they can leave the nursery. After planting, the cup-shaped street trees should be pruned for 4-5 years as in the seedling stage until the crown has 4-5 lateral branches. After the annual dormancy period, the branches of that year will be born.