Nephrolepis is a genus of ferns in family Lomariopsidaceae, comprising about 30 species. It is an evergreen or semi-evergreen ferns, grown as an ornamental plants, good in containers and hanging baskets. Nephrolepis is one of the best over all plants at removing gaseous toxins in the air, including formaldehyde.
Nephrolepis exaltata (Sword Fern) is native to tropical regions throughout the world. It is commonly found in humid forests and swamps, especially in northern South America, Mexico, Central America, Florida, West indies, Polynesia and Africa. It is often grown as house plant. It makes neat clumps of narrow arching fronds. Nephrolepis exaltata is the parent for many cultivars, of which the best known and most widely grown is 'Bostoniensis' (Boston Fern), which has lance-shaped fronds.
Nephrolepis obliterata (Kimberly Queen Fern) is originated in Australia but is very easy to cultivate indoor worldwide. It prefers bright but indirect sunlight, sensitive to both too little and too much water. Nephrolepis obliterata has an added benefit of reducing indoor air pollution, particularly formaldehyde, xylene and toluene.
Nephrolepis cordifolia has gracefully arching fronds formed of near-oblong pinnae, and is a wonderful patio fern in summer.
Nephrolepis is trouble-free, plant it in sun or partial shade, moisture-retentive but well-drained soil. Propagation is by division in spring or autumn.