Answer: The best thing you can do for your bougainvilleas is to prune out all of the damage from the past winter. Bougainvilleas produce flowers and leaves on new growth and pruning encourages new growth, so removing the damaged branches and stems will help renew your plants. I've cut mine down severely (to within a few feet of the ground) and had them come back without problem. Prune yours back and you'll be amazed at how quickly they produce new stems, leaves and flowers.
Best wishes with your bougainvilleas!
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