Will new crape myrtle plants die in winter?

Question

Our weather is mild. Freezing doesn’t last over a couple of days.

Answer 1

Your crape myrtles shouldn't die in zones 7b and 8a, which you are. The worst scenario if you had unusually cold weather would be if they died back to the ground and came back from the roots. I live in zone 6 and crape myrtles are everywhere.
Here are growing tips:
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/crepe-myrtle-care.htm