Answer: Sounds like your bougainvillea is showing signs of stress. If you recently planted it, transplant stress coupled with exceptionally hot weather can take its toll. Curling leaves is the plant's way of conserving moisture. Yellowing leaves scattered throughout the plant are normal and they will be replaced with healthy new leaves but if the plant is completely yellow, it is showing signs of heat stress. At this point I can only suggest you water it deeply once or twice a week and give it time to adjust to its new home - and time for the weather to cool down a bit. Once that happens you should see new growth which indicates it is safe to prune off the damaged stems and branches. I think your bougainvillea will pull through - you just need to be patient as it adjusts. Best wishes with your bougainvillea!
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