I brought a white, pink and red plumeria cutting from Oahu 5 years ago. The red one is the only one that survived.

It is now about 5 ft tall. I have it in the house in a pot.

It tried to bloom last year but the bud fell off before the blossoms matured. I re potted it hoping this would help but still no blossoms.The leaves look great.

I do not put it outside except in the hot part of the summer. And it is in a very sunny window.

Any advise?