When my plumeria were a manageable size, I used to move them into the house in front of a bright window. They go somewhat dormant, and stop growing, but they don't always lose their leaves. They did well and continued on growing to what they've become today. Be careful of spider mites anytime you bring them indoors. I broke many branches trying to get them in and out of the house door. Eventually, I built a greenhouse. This will be my second wint-er using the GH. But I am thinking heavily about trimming my tallest tree. She is a monster and quite a challenge for me to move, let alone get into the greenhouse! But I just got blooms on her for the second time in over 20 years. I really, really hate to stifle that especially because I don't have many trees.