The dos and don’ts of pruning Crepe Myrtles. We traveled around to find a few examples of what to do, and what not to do when pruning your Crepe Myrtles. Crepe Myrtles DO NOT need to be pruned heavily to control their height. The only time that Crepe Myrtles truly need to be pruned is to promote natural growth habit and good branch structure by removing dead, diseased, or crossing branches. They can also be pruned to remove unwanted suckers from the base or to clean, spent flower buds from the p