Leatherleaf fern (Rumohra adiantiformis) is a slow-growing fern appropriate for the mild climates of U.S. Department of Agriculture growing zones 8 to 11. The attractive green fronds are a favorite addition to floral arrangements, providing a contrast to colorful flowers. The simplest way to propagate leatherleaf ferns is by division. If you are adventurous and patient, propagate the ferns by spores located on the underside of the leathery fronds.
Because leatherleaf fern is a slow-growing plant, division, which results in an attractive, ready-to-use plant, is the preferred method for propagation of leatherleaf ferns. Propagation by division is simple, and with proper care, the success rate is high. Division is also a good way to revive older ferns or ferns that have outgrown their boundaries. To divide a leatherleaf fern, dig an entire clump. If the clump is large, dig just one side of the plant. Separate a smaller clump from the parent plant, pulling the roots apart gently. Plant the separated fern in its new location.
Growing a new leatherleaf fern from spores is a fascinating but slow propagation method in which spores, located on the underside of the leaves, are planted in a pot, on top of moist soil. The pot is placed in a plastic bag, because fern spores require a warm, moist environment. When tiny ferns appear in a few months, they are transplanted into individual pots and allowed to mature until they are large enough for planting outdoors.
Plant leatherleaf ferns where the plants are protected from direct, hot sunlight, as too much sunlight scorches the fronds and may kill the plants. Light morning sunlight is appropriate, or plant the new ferns in shade or indirect, filtered light. Avoid heavy, clay soil. Ferns require soil that is consistently moist but well-drained.
Leatherleaf ferns are an ideal ground cover for shady or semi-shady spots where few plants will grow. Because the fern grows slowly, it is a good choice for small areas such as the corner of a garden or near a protective fence. The ferns also do well in an outdoor hanging basket. Harvest the fronds from large ferns for use in floral arrangements.