Down South, who gives crepe myrtle another thought?  Up North, though, it's a stop-and-marvel.  Here's one, in a huge pot right on the street in Manhattan, still blooming in early Fall.

Sure, some of the hardier crepes thrive even into CT and the Cape.  But growing in a container?  You need to be a Zone hardier than growing in the ground.  Will this crepe leaf out in Spring?  Stay tuned!