Will Mandevilla Roots Come Back In The Spring

Q: I know that potted Mandevilla cannot live outdoors below 50 degrees F.
But what if the root is buried in the ground, will it come back in the spring?

A: Mandevilla roots are almost as sensitive to cold as the stems. I’ve tried
three times to get one through the winter outdoors and after three strikes I’m
out. On the other hand, if you have room indoors, you can bring the pot inside
and situate before a bright sunny window. You may need to trim it to fit the
space. Lots of leaves will drop during winter but the plant will usually come
back strongly when you plant it outdoors in spring.