Delta Maidenhair Fern (Adiantum tenerum)

Delta Maidenhair Fern

Adiantum tenerum

Delicate fronds unfurl like lace, softening indoor spaces. Evergreen fern; common name: Delta Maidenhair Fern.

Partial sun
2–3/week
Moderate
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun which can scorch delicate fronds
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Watering Keep soil consistently moist but not waterlogged; use room-temperature water to prevent leaf tip burn
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Temperature Thrives in warm, humid conditions; avoid cold drafts and temperatures below 12°C
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Characteristics

  • Frond: Delicate, triangular, finely divided leaflets with bright green, hair-like petioles
  • Rhizome: Short, creeping, covered in small brown scales
  • Sori: Clustered on undersides of leaflet margins, protected by folded leaf tissue
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Care Guide

Watering

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

Fertilization

Diluted balanced liquid feed every 4 weeks. Avoid over-fertilizing, as excess nutrients can damage delicate fronds

Banana peel compost tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to support healthy frond growth without nutrient burn
Pruning
  • Trim browned frond tips with sharp, sterile scissors to maintain appearance
  • Remove dead or yellowing fronds at the base to improve airflow and reduce fungal risk
  • Divide overcrowded clumps in spring for propagation and to refresh the growing medium
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic; no adverse effects reported

Humans: No known toxic effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental indoor foliage, terrarium plant, shaded garden groundcover in tropical climates