The following info is from the Florida Extension Service:
Bougainvillea is a wonderful addition to any landscape, whether it's used as a permanent fixture, a container plant or hanging basket in a semi-tropical landscape, or an annual in cooler climates. For the best performance out of your Bougainvillea, follow these guidelines:
* Keep Bougainvillea on the dry side, especially if you want lots of blooms. Too much water will promote root rot and cause leaves to drop. Don't water on cool nights.
* Use a high-bloom fertilizer.
* Plant or place Bougainvillea in full sun. As a potted plant, flowers will last for up to eight weeks if kept in a sunny location.
* Winter dieback may be a problem if the weather gets too cool, so if you're growing Bougainvillea in a frost-prone area, plant in a protected location or cover in case of frost.
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