Crape Myrtle

Question

I have 2 crape myrtles in our garden. They grew quite tall in the summer, although I pruned them before the new growing season. Maybe I didn’t prune them low enough. When should they be pruned and how low should I prune them?

Answer 1

I am not sure why yours would have grown so tall, unless it is producing suckers after being topped:
http://www.clemson.edu/extension/hgic/plants/landscape/trees/hgic1009.html

Also, excessive nitrogen fertilizer can cause trees to grow too fast.

Here are some guides to pruning crape myrtles:
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/pruning-crepe-myrtle-trees.htm
https://pender.ces.ncsu.edu/2013/02/how-do-i-prune-crape-myrtle/
http://edis.ifas.ufl.edu/ep399