Answer: Bougainvilleas bloom on new growth so pruning every few months should encourage flowering. They grow, bloom, rest and then repeat the process, usually every 6-8 weeks. Too much nitrogen can keep them from blooming, as can lack of sufficient sunshine. If yours have bloomed in the past but are reluctant to bloom now, you may only need to prune them back to get them into the growth/bloom cycle again. Good luck with your garden!
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