Adiantum x 'Mairisii'Hardier selection of the southern maidenhair fern surviving to zone 6 in cold hardiness. Mairisii has the great foliage of the typical southern maidenhair fern growing to around 18" tall by 24" wide. Plant in light to medium shade. Give good drainage and consistent moisture. Few pests. Easy to grow. USDA zones 6-9 in cold hardiness.