Autumn Fern (Dryopteris erythrosora)

Autumn Fern

Dryopteris erythrosora

Its fronds turn coppery-pink in spring, a warm splash in shaded gardens. Evergreen fern; common names: autumn fern, Japanese shield fern.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Dappled shade or gentle morning sun; avoid direct midday sun which can scorch young fronds
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Watering Keep soil consistently moist but not waterlogged; avoid allowing the root ball to dry out completely
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Temperature Thrives in cool to temperate conditions; tolerates short light frosts down to -5°C with minimal damage
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Characteristics

  • Frond: Triangular, bipinnate fronds emerge coppery-pink, maturing to glossy dark green; 40–70 cm long.
  • Rhizome: Short, scaly, creeping underground rhizome that forms dense clumps over time.
  • Sori: Round, brown spore clusters arranged in neat rows on undersides of mature fronds.
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Care Guide

Watering

Keep soil evenly moist; mist fronds during prolonged dry spells to boost humidity

Fertilization

Apply diluted organic feed once monthly. Use low-nitrogen organic feed to support frond development without excessive foliage growth

Composted leaf mold tea:Steep fully decomposed leaf mold in water for 24 hours; dilute 1:20 to drench soil; avoid applying directly to fronds to prevent staining
Pruning
  • Remove brown, dead fronds at the base in early spring to make space for new growth
  • Thin overcrowded clumps every 2–3 years to improve airflow and reduce disease risk
  • Trim damaged or broken fronds at the base to maintain a tidy appearance
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no adverse effects from ingestion or contact

Humans: No known toxicity to humans; safe for handling and proximity

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental shade garden plant; ground cover in woodland settings; container cultivation for indoor shaded spaces