The Foster Holly is small-to-medium-sized evergreen tree with an upright, pyramidal habit. It typically grows to a mature height of 20 feet with a spread of 10 to 15 feet, which makes it the perfect tree for natural screening or hedge purposes. Its leaves are glossy, dark olive green and elliptical; about 2 to 3 inches long. It produces small white flowers in late spring, which are followed in fall by an abundant crop of red, berry-like drupes. Female plants will produce fruit even without fertilization from a male pollinator. This evergreen will grow to reach a height between 10 and 20 feet at maturity.