When trimming a maple tree in the winter, wait until the coldest period has passed. Don’t be surprised if the maple tree has flowing sap while trimming the branches. This is normal and stops after the leaves fall out.
Pruning a maple tree should be done after the seasonal growth is over. Most trees do not do well being pruned during fall. Summer and winter trimming is ideal. Trimming a maple tree on a regular basis helps it to keep its structure and size. It also lengthens the life span of the tree. Remove any diseased or dead branches found while pruning.