Large pink trumpet shape blooms cover mandevilla vine during summer, conjuring scenes of tropical beauty. This vine is a stunner that’s often grown in containers or hanging baskets. It makes a striking pillar of color when grown on a pot obelisk trellis. In most zones mandevilla is an annual vine that grows 6 to 8 feet in a single season. Overwinter indoors in a cool spot (above 45 degrees F). Leaves may drop, so water just enough it keep it alive. Growth will resume in spring. Mandevilla is hardy in Zones 10-11, where it can reach 10 to 15 feet tall and 2 to 3 feet wide. Why we love it: Mandevilla is easy to grow and infuses even the northernmost garden with a tropical ambience.