Swiss Clubmoss (Selaginella helvetica)

Swiss Clubmoss

Selaginella helvetica

Delicate, moss-like foliage forms dense, low mats. Evergreen spikemoss; common name: Swiss clubmoss.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; tolerates full shade; avoid harsh direct midday sun that can scorch delicate foliage
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Watering Keep soil consistently moist but not waterlogged; use soft, room-temperature water to prevent leaf browning
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Temperature Thrives in cool, consistent temperatures; avoid extreme heat above 25°C and frost below 0°C
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Characteristics

  • Foliage: Small, scale-like leaves arranged in dense, overlapping whorls; bright to deep emerald green
  • Stems: Slender, creeping stems that root at nodes to spread horizontally
  • Sporangia: Tiny cone-like strobili at stem tips bearing reproductive spores
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Care Guide

Watering

Maintain consistent soil moisture; mist foliage 1–2 times weekly to boost humidity

Fertilization

Diluted balanced liquid feed once every 6 weeks. Use only highly diluted feed to prevent nutrient buildup in compact soil

Composted eggshell powder:Mix a small amount of finely ground, fully dried eggshell powder into topsoil every 3 months to support root health; avoid over-application to prevent soil alkalinity
Pruning
  • Trim back brown or dead foliage to maintain a neat, uniform mat appearance
  • Thin overcrowded stems to improve airflow and reduce fungal disease risk
  • Remove any yellowed growth to redirect energy to healthy, actively growing foliage
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Shaded rock garden ground cover; closed terrarium ornamental plant