Experts and BHG readers answer.
Thanks for writing. Has your area seen extra rain than usual or are you watering your bougainvillea a lot? These plants do best in dry soil --- and if it stays too moist, it can keep them from blooming as well.
Is it a new plant you've grown for the first time this year? If so, it may need to become established before it blooms.
---Justin, Senior Garden Editor, BHG.com