Full Sun to Partial Shade- Mary Nell holly is a pyramidal evergreen shrub or small tree with very shiny dark olive green leaves. The leaves are 3-4 in (7.6-10.2 cm) long and have short spines along the margins. Mary Nell grows with a single stem and unless it is kept pruned, can get 10-20 ft (3.1-6.1 m) tall with a 10 ft (3.1 m) spread. Mary Nell holly is a female clone and she produces an abundance of vivid red berries that seem to grow in a spiral around the stems. The showy berries persist on the bush for an extended period in the fall and winter.