Quart Plant of Thunbergia alata Arizona Red. This tender perennial vine is an evergreen vine that grows to 8 to 10 feet tall, and quite quickly I might add. The bright rose colored blossoms cover this plant from mid summer until late fall and always seem to have some flowers in blossom. Arizona Red is one of my personal favorites. This variety of Thunbergia is much brighter and more vibrant than any of the others black eyed susans. Root hardy to 20 degrees. USDA Hardiness Zones 9 to 10