My mom had a bougainvillea on the side of her home in Sabal Chase. It was killed to the ground in the winter of 2008, or so I thought. In the spring, we noted a sprout when we were cutting it apart. It recovered and grew well until the winter of 2009-2010 when the cold again knocked it to the ground, but it came back this spring.
My own bougainvillea was damaged in 2007, but recovered well. Last winter, I cut it back severely and covered it with a blanket during the freezes. It came back very well this year and looks nice. I plan on cutting it back and covering it if the temps are scheduled to get into the low 30's.
I have a great many tropical plants in my birdcage that I move under the lanai roof, enclose with Plankets, and use light bulbs underneath for warmth. They do very well with this technique. I would think a potted bougainvillea would do as well.
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