Winterberry Holly is grown in average, acidic, medium to wet soils in full sun to part shade. Good tolerance for poorly drained soils including wet boggy or swampy conditions. Winterberries are separate male and female plants. Only fertilized female flowers will produce the attractive red berries that are the signature of the species. Generally, one male winterberry will be sufficient for pollinating 6-10 female plants. Flowers appear on new growth. Flowers, if properly pollinated, give way to a crop of bright red berries that are quite showy and will persist throughout the winter. Its fruits are eaten by over 48 species of birds, including cedar waxwings, and small mammals.