Maidenhair Fern. Maidenhair ferns have delicate fan-shaped leaf segments, typically clustered on wiry black stems. In addition to being a popular houseplant, maidenhair fern can also be found in nature, growing in places where other plants typically don't, like on rock walls and in between rock fissures where the moisture from water seepage keeps them alive. Prefers bright indirect light, avoid harsh direct sunlight that may burn your plant’s leaves. 2-3 times a week. Water sparingly, making the potting mixture barely moist and allowing the top third to dry out before watering again.