Monarch Fern (Phymatosorus scolopendria)

Monarch Fern

Phymatosorus scolopendria

Its fronds unfurl like delicate green feathers, a lush addition to shaded spaces. Evergreen epiphytic fern; common names: monarch fern, musk fern.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect or filtered shade; avoid direct midday sun which can scorch fronds
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Watering Keep growing medium consistently moist but not waterlogged; mist fronds to maintain ambient humidity
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Temperature Thrives in warm, humid conditions; avoid temperatures below 12°C to prevent leaf browning
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Characteristics

  • Frond: Leathery, pinnately lobed fronds with rounded segments; glossy dark green
  • Rhizome: Thick, creeping rhizome covered in brown, scale-like hairs
  • Sori: Clustered yellowish-brown spore-producing structures on frond undersides
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Care Guide

Watering

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

Fertilization

Diluted balanced liquid feed every 4 weeks. Use half-strength fertilizer to prevent nutrient burn on sensitive fronds

Spent tea leaf compost tea:Steep fully composted black tea leaves in water for 24 hours; dilute 1:20 for root drench; avoid raw leaves to prevent mold growth
Pruning
  • Trim brown, damaged fronds at the base to preserve plant energy and appearance
  • Remove dead rhizome sections to encourage new frond growth
  • Thin overcrowded fronds to improve airflow and reduce fungal disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirms non-toxic to cats; no reported toxicity

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 epiphyte for terrariums, hanging baskets, or shaded garden beds; provides lush green foliage in low-light spaces