Q.no flowers on bougainvillea
Lack of flowers or buds on vibrant bougainvillea. Plants are in large pots and get watered by sprinklers. How can we force some buds/flowering? Plants get full Southern California sun.

Certified GKH Gardening Expert
Please see this article on how to promote blooms on bougainvillea:
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-not-blooming.htm
Here are some general reasons a plant may not flower:
https://www.gardeningknowhow.com/plant-problems/environmental/plant-not-blooming.htm