Sword Fern (Nephrolepis cordifolia)

Sword Fern

Nephrolepis cordifolia

Lacy fronds cascade like green waterfalls, softening indoor corners. Evergreen fern; common names: fishbone fern, sword fern.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; tolerates low indoor light with slower growth; avoid direct midday sun which scorches fronds
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Watering Keep soil consistently moist but not waterlogged; avoid letting the top 1 cm of soil dry out completely
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Temperature Thrives at 18–24°C; protect from cold drafts and temperatures below 10°C to prevent leaf browning
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Characteristics

  • Leaf: Arching, pinnate fronds with small, oval leaflets arranged in a fishbone pattern
  • Rhizome: Creeping, wiry runners that produce new offshoot plantlets
  • Sori: Clusters of spore cases on the undersides of mature leaflets
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Care Guide

Watering

Keep substrate evenly moist; mist fronds 2–3 times weekly to boost humidity

Fertilization

Diluted balanced liquid feed every 4 weeks. Avoid over-fertilizing to prevent leaf tip burn

Banana peel compost tea:Compost banana peels for 2 weeks, steep in water, dilute 1:20 for root drench; discard solid peels to prevent fruit flies
Pruning
  • Trim brown, dead fronds at the base to maintain a tidy appearance
  • Remove overcrowded runners to prevent overgrowth and improve airflow
  • Divide mature clumps in spring to propagate new plants
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic; no harmful effects from chewing or ingestion

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental foliage for hanging baskets, tabletop displays, or shaded ground cover