Nephrolepis exaltata, is an evergreen fern,commonly called sword fern or Boston fern. The fronds of Nephrolepis exaltata are 50–250 cm long and 6–15 cm broad, with alternate pinnae (the small "leaflets" on either side of the midrib), each pinna being 2–8 cm long. The pinnae are generally deltoid, as seen in the adjacent picture. The pinnate vein pattern is also visible on these highly compound leaves. The edges appear slightly serrate.
Nephrolepis exaltata Bostoniensis grow best in medium to low indirect bright light. Tolerant of some shade. Soils should be kept consistently moist, with only a slight reduction in watering from fall to late winter. Prefers high humidity and may appreciate being set on a tray of wet pebbles. Weak fertilizer applications may be made monthly from spring to early fall. Will shed fronds if soils dry out, at which point all fronds may be cut back to about 2” to regenerate. Frond tips may brown up in winter conditions where humidity is low.
As an indoor fern, it is perhaps best for pedestals or hanging baskets. Locations in or near bathrooms or kitchens may have better humidity..