What do I do with Mandevilla in the winter? It can not be taken inside.

Question

I want to put mandevilla outside in the garden, would I cut it back for the winter?

Answer 1

You are in zone 9a and this is within the growing zone for Mandevilla.
If your temps fall below a normal range for your area, you can add some protection with plant blankets; they are found at garden centers.

https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-ground-cover.htm