Mahogany Fern (Didymochlaena truncatula)

Mahogany Fern

Didymochlaena truncatula

Its glossy mahogany fronds bring warm forest elegance indoors. Evergreen terrestrial fern; common name: mahogany fern.

Partial sun
2/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun which can scorch frond edges
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Watering Keep soil consistently moist but not waterlogged; use room-temperature, chlorine-free water
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Temperature Thrives in warm, humid conditions; avoid temperatures below 15°C to prevent frond browning
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Characteristics

  • Frond: Glossy pinnate fronds with deep mahogany undersides and medium green upper surfaces
  • Rhizome: Short, creeping rhizome covered in brown, fibrous scales
  • Sori: Linear spore-producing sori aligned along the margins of mature leaflets
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Care Guide

Watering

Maintain consistent soil moisture; mist fronds 2–3 times weekly to boost humidity

Fertilization

Diluted balanced liquid feed every 4 weeks. Cease fertilization in autumn and winter when growth slows

Banana peel compost tea:Use fully composted banana peels; dilute 1:20 with water for root drenching to avoid mold or odor
Pruning
  • Remove brown, dead fronds at the base to maintain a tidy appearance
  • Trim overcrowded fronds to improve airflow and reduce pest risk
  • Divide clumps in spring when pot-bound 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 if ingested or touched

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

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental foliage for indoor planters, terrariums, and shaded garden borders