@trixcanada, in temperate regions, plumeria go dormant. Even in tropical and sub-tropical areas they will go semi-dormant. Dormancy for use can last 4-6 mo. I too am in a temperate zone, but certainly far warmer and brighter than you in Canada (if that's where you live). I keep some of my plumeria in my solarium during the fall and winter months, keeping them watered and even lightly fertilized. The solarium get full sun, having a glass roof and an eastern facing glass wall. Thus I can provide my tropical plants as close to "outside" conditions as possible. Even then, though I can prolong my Plumeria's growth and flowering for several months, come February, they'll start losing leaves and by March, they'll all be basically leafless.
Thus, I would expect your plant to be dormant and during dormancy it needs no water and certainly no fertilizer. When you can get it back outside it will "wake up" and begin growth again. You can give it a drink when you get it outside, but until it has leaf growth, the plant really can't use much water.
