Keep the new divisions well-watered until plants are established. Like other perennial plants, you can divide ferns in spring or fall. Most prefer rich, humus-filled soil, so make sure to mix compost into planting holes and cover them annually with 2 inches of organic mulch. Ferns can reach 12 inches to 6 feet tall, depending on the type and growing conditions. In all climates, they need protection from afternoon sun to prevent drying and leaf scorch. Plant ferns in part to full shade and rich, well-drained soil.
Robert Cardillo How to Grow Ferns in Your Garden Ferns can thrive in a variety of environments, including squeezed between large boulders.
