I have had a bougainvillea for two years that looks beautiful but has never bloomed. There are many varieties with differing vigor and growth habits. Improper fertilizer application, pruning technique or timing, and sun exposure will affect the plant's ability to bloom, says UC master gardener Carol Bowden.
Bougainvillea does best in the Southern California coastal areas.
It likes full sun with light shade in the hottest areas. It can survive in frost areas if planted in a warm spot or protected by a warm wall. During the first couple of years, protect the roots from frost by covering the root area with a deep layer of mulch. It needs fertilizer in spring and summer. Water normally while plants are growing fast, then ease off temporarily in midsummer to promote better flowering.