Answer: This native to Brazil is hardy to zone 9A, so if you want to grow them in Mississippi, you'll need to dig them up each winter and store them inside. Lots of people do it, too, because allamanda is such a wonderful vine. The vining species will grow and grow til something stops them, so gardeners should pinch out growing tips to encourage branching for a more attractive form. If you want to try a smaller version, there is a bush allamanda (A. neriifolia) which grows to 3' tall and has flowers 1 to 1-1/2" across. It prefers full sun, whereas vining types can stand some shade.
If you want to try overwintering the plant, bring it inside and put it in a bright spot, and keep it a little on the dry side, but don't let the soil dry out completely. When the buds start to swell in spring, do any pruning to shape the bush and remove damaged or crowded shoots. When night temperatures remain above 60F, you can safely place your allamanda outside. Allow them partial shade for the first week, or until it's clear that they are growing well - a sign that the roots are back in business! They are heavy feeders and need a lot of moisture. Enjoy!
Q&A Library Searching Tips