Plumeria

Question

About 4 inches of the tips of the branches were damaged by freezing temperatures. It is now warming up, and I’m not sure if I should trim the ends and how far down to trim them. I had another Plumeria for many years and the same thing happened to it, even after protecting it. I pruned it but it did not survive.

Answer 1

Wait until spring (after the last chance of frost in your region) before pruning to avoid any additional frost damage. Once it's spring, you can prune the tips back, removing the damaged portion until you see healthy tissue inside the branches:

https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
http://msue.anr.msu.edu/news/pruning_frost_damaged_plants