hava a plumeria in a large pot. it is over 8 feet high with 2 branches. bloomed every summer, brought inside in winter [south Mississippi]. getting hard to handle. haw far down can i prune?
You can safely reduce by about 25% (2 feet) especially if you can cut back to lateral branches and leave some green foliage. Cutting back to a bare stub will be ugly until spring/summer when it will probably refoliate. But it's safer to leave some green. If you take it down more than that you may get away with it and it will re-foliate in spring but it is more risky for disrupting the physiological balance and creating severe stress.
Water and fertilize to support the changes and regrowth.