1. Generally, when the stem of Liriodendron chinense grows to 15 cm, the top can be pinched for the first time to prevent Liriodendron chinense from growing too high and promote the branch of Liriodendron chinense for later pruning.

2. It is most suitable for pruning when young Liriodendron trees are not yet formed. At this time, it is only necessary to trim the branches and leaves of Liriodendron, or the branches are too long to make the plant look uneven. This not only promoted the growth of young Liriodendron, but also made Liriodendron have a beautiful appearance.

3. For Liriodendron which has been maintained for 4~5 years, its branches are already thick and its plant type will be large, so it needs to be pruned again. Generally, the growth time is long, and Liriodendron should be changed every once in a while. Therefore, we can properly prune its root system, cut off the old roots and cut off too high branches to promote the germination of new branches.