I have a Bougainvillea in Coastal South Carolina - 29910 zip code. How should I treat it over the winter? Can it stay outdoors?
Your area has 2 USDA climate zones. One of which this plant can survive outdoors, and one that is right below the growing zone for this plant. If you are able to, on the coldest nights you may want to bring it inside. Here is an article for more information: https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-garden-care.htm