Pint plant Antigonon leptopus, a tender perennial vine that can easily grow to 30-40 ft in length and uses its tendrils climb. Returning each spring if a hard frost has occured during the winter, the coral vine has attractive green heart-shaped leaves that are 3 to 4 inches across. In summer the vine produces large branching flower stalks with masses of small bright pink flowers. Zones 8 to 10.