Live in Central Florida - get occasional freeze in Jan or Feb. When should I prune my tree back? Some here say Jan - I thought it was always Feb or March.
Pruning Crepe Myrtle
Certified GKH Gardening Expert
February is a good time to prune the tree in it's dormancy.
Don't be to quick to prune your tree, often a Crepe Myrtle does beautifully without pruning.
Here are some links that will give you more information and help you.