Bird's nest fern
Also known as
Nest fern, Asplenium nidus, South Pacific bird's nest fern
Keep this plant’s care guide close at hand.
Get the appAbout Bird's nest fern
Asplenium nidus, commonly called the bird’s nest fern, is an epiphytic fern prized for its graceful rosette of upright, strap-like fronds that unfurl from a central, cupped crown resembling a nest. The fronds are glossy, apple-green with a prominent black midrib, and can reach over 2–3 feet indoors under ideal conditions. In nature it grows on tree trunks or rocks, collecting leaf litter and moisture, so it appreciates airy, moisture-retentive media and high humidity. Unlike many ferns with finely divided fronds, its simple, leathery fronds resist minor household drafts better and shed dust easily. It thrives in warm, shaded rainforest conditions and adapts well to bright, indirect indoor light. Key to success is avoiding water pooling in the crown, which can cause rot, and maintaining consistently moist—not soggy—substrates. With gentle feeding during the growing season, stable humidity, and protection from harsh sun, A. nidus provides a lush, architectural focal point in homes, terrariums, and shaded verandas.
Taxonomy
Properties & Requirements
How to care for Bird's nest fern
Water
Keep the medium evenly moist but never waterlogged. Check moisture with a finger 1–2 cm deep; water thoroughly when the top layer feels barely dry. Pour water around the inner rim of the pot, not directly into the crown. Use room-temperature, low-mineral water if possible, and allow excess to drain completely. In high light or warm conditions, watering frequency increases; in cooler, lower light, reduce frequency. Never let the mix fully dry out for extended periods.
Light
Provide bright, filtered, or medium indirect light—similar to dappled forest shade. Morning sun through a sheer curtain is acceptable, but avoid harsh midday or afternoon sun, which scorches fronds. It tolerates lower light, though growth will slow and fronds may lengthen. Aim for 100–250 μmol·m⁻²·s⁻¹ (1,000–2,500 foot-candles) if you measure. Rotate periodically for even form and keep a safe distance from hot windows.
Nutrients
Feed lightly during spring and summer with a balanced, dilute (¼–½ strength) liquid fertilizer every 4–6 weeks. Ferns are sensitive to salt buildup; choose urea-free or organic options (seaweed/fish emulsion) and periodically flush the potting mix to prevent accumulation. Do not place slow-release prills in the crown and avoid fertilizing dry soil. Withhold or reduce feeding in autumn and winter when growth slows. Overfertilization can burn frond tips and invite root stress.
Temperature
Ideal temperatures are 18–27°C (65–80°F). Brief dips to 15°C (59°F) are tolerated, but growth slows below this, and damage occurs near 10–12°C (50–54°F). Protect from cold drafts, heat vents, and sudden fluctuations. Warmer conditions require higher humidity and more attentive watering to prevent leaf edge crisping. This fern is not frost-tolerant and should remain indoors or in a greenhouse in temperate climates.
