Gallon Plant from Thunbergia grandiflora var. Variegated Blue Sky vine. This is truly vine collectors must have. The soft holly shaped leaves are deeply variegated with creamy white. The large 2-inch blossoms are softer blue than some of the normal clock vines. Growing to 15 feet, it is certainly going to be the specimen plant of the garden. Hardy in zones 8 to 11, and is root hardy to 20 degrees, but will freeze back at 25 degrees. Requirements are sun to part shade and they do not like their roots standing in water.