Is the mandevilla vine evergreen or will it be bald during the winter? Mine will get morning sun up to about noon. Is that enough?
They are usually grown indoors unless you live in a warm climate. If temps fall below 50 F., they should be overwintered indoors. This article should help you with its care: https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-plant.htm