Adiantum formosum: Black Stem Maidenhair

Adiantum formosum, the Black Stem Maidenhair, Giant Maidenhair, or Australian Maidenhair, is a large, robust, evergreen fern native to Australia and New Zealand. It forms a spreading clump of bipinnate to tripinnate fronds up to 3-4 feet tall. The stipes and rachises are a striking, glossy, jet-black. The pinnules are large, fan-shaped, and a bright, fresh green. The contrast is dramatic.

Plant Profile

This maidenhair requires a mild, frost-free climate (USDA 9+), bright shade, and consistently moist, well-drained, humus-rich soil. It is more robust and sun-tolerant than many Adiantum. The black stems are its signature feature. It is a magnificent specimen for subtropical gardens, conservatories, and large containers. Protect from drying winds.