We love plumerias and bought our stick in hawaii on our honeymoon. it bloomed its third year. We are in Austin Texas so I put the pot outside in the summer, but have been putting it in the garage in the winter and just watering it minimally. It drops its leaves and then in the spring sprouts again and gets lovely. I had tried to bring it inside in the winter, but it still dropped its leaves - way too dry for it and I also wondered if it was too dark, though I had it in a sunny window. I am amazed it is blooming for you inside. Daily misting..... ah ha! What exposure do you have it in in your house?
Redbudlover