Long-pinna Spikemoss (Selaginella longipinna)

Long-pinna Spikemoss

Selaginella longipinna

Its feathery fronds unfurl like delicate green lace. Evergreen fern ally; common name: long-pinna spikemoss.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun to prevent frond scorching; tolerates low light for short periods
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Watering Keep substrate consistently moist but not waterlogged; use distilled or rainwater to avoid mineral buildup on fronds
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Temperature Thrives in warm, humid conditions; avoid temperatures below 12°C to prevent cold damage and frond browning
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Characteristics

  • Fronds: Feathery, pinnately arranged, bright green, with delicate, fine-textured segments
  • Stems: Slender, creeping, and root at nodes to form dense, spreading mats
  • Sporangia: Produced in upright strobili at the tips of mature fronds
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Care Guide

Watering

Maintain steady moisture; mist fronds 2–3 times weekly to boost ambient humidity

Fertilization

Diluted balanced liquid feed every 4 weeks. Avoid over-fertilizing, as excess nutrients can cause frond tip burn

Banana peel steeped tea:Steep dried banana peels in water for 3 days; dilute 1:20 with water for root drenching; discard solid peels to prevent mold growth
Pruning
  • Trim browned frond tips with clean scissors to maintain a neat appearance
  • Thin overcrowded mats to improve airflow and reduce risk of fungal growth
  • Remove fully dead fronds at the base to encourage new, healthy growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic; no harmful effects if ingested or touched

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: Terrarium ornamental, shaded ground cover, indoor tabletop foliage