No science in my thought, but I generally cut mine back in January.
After all the leaves are gone and all of the twigs" snap"

"David" wrote in message
news
Greetings All,

I have several Crate Myrtles at my house and I was wondering if anyone
could
advise as to when the best time to trim these back would be? I seem to
remember my neighbors doing this about this time last year, but a few
Google
searches I did said to cut right after they bloom (Before August?). Some
central Texas specific advice would be appreciated (if applicable).

Thanks!
David