Spinulose Wood Fern (Dryopteris carthusiana)

Spinulose Wood Fern

Dryopteris carthusiana

Lacy fronds unfurl like delicate green lace, adding soft texture to shaded gardens. Deciduous perennial fern; common name: Spinulose Wood Fern.

Low light
1–2/week
Beginner
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Plant Needs

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Sunlight Prefers dappled shade or full shade; avoid direct midday sun which can scorch 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 Extremely cold-hardy; tolerates cool to mild summer heat, with optimal growth between 10–20°C
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Characteristics

  • Frond: Triangular, bipinnately compound fronds with finely serrated, spinulose leaflets
  • Rhizome: Short, scaly, creeping underground rhizome
  • Sori: Round spore clusters on underside of fertile fronds, covered by kidney-shaped indusia
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Care Guide

Watering

Keep soil evenly moist; mist fronds occasionally to boost ambient humidity

Fertilization

Diluted organic feed once every 6 weeks. Use low-nitrogen organic feed to promote frond growth without burning delicate roots

Composted banana peel tea:Fully compost banana peels, steep in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations
Pruning
  • Remove brown, dead fronds in early spring to make space for new emerging fiddleheads
  • Trim damaged frond tips to maintain a tidy, uniform appearance
  • Thin overcrowded clumps every 2–3 years to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

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

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 groundcover for shaded woodland gardens; low-light indoor foliage plant