After atleast five years maybe more one of my bougainvillea has bloomed. When I first put it out in the spring, it got sunburned and all the leaves fell off. Then I needed to repot it, so again it was shocked. But the other day I looked at the plants on the deck and there right before my eyes she was blooming again. Now I hope my other one that went outside a few weeks later and had the same things happen to it will bloom.