Interrupted Clubmoss (Lycopodium annotinum)

Interrupted Clubmoss

Lycopodium annotinum

Its tiered spore cones add prehistoric texture to shade gardens. Evergreen perennial fern ally; common name: interrupted clubmoss.

Low light
1–2/week
Beginner
🌱

Plant Needs

☀️
Sunlight Prefers dappled or full shade; avoid direct summer sunlight which can scorch foliage
💧
Watering Keep soil consistently moist but not waterlogged; avoid allowing the growing medium to dry out completely
🌡️
Temperature Extremely cold-hardy; tolerates cool to moderate summer temperatures up to 25°C
🔍

Characteristics

  • Leaf: Small, linear, needle-like evergreen leaves arranged densely along stems
  • Stem: Creeping, branching rhizomes with upright aerial stems
  • Spore Cone: Tiered, interrupted spore-bearing strobili (cones) atop upright stems in summer
🛠️

Care Guide

Watering

Keep soil evenly moist; mist occasionally to maintain ambient humidity

Fertilization

Diluted organic feed once every 2 months. Use low-nitrogen organic feeds to support steady growth without promoting excessive foliage

Composted leaf mold tea:Steep fully composted oak or maple leaves in water at a 1:20 ratio for 24 hours; use as a root drench to enrich soil organic content
Pruning
  • Trim dead or yellowing aerial stems to maintain tidy, compact growth
  • Thin dense mats of rhizomes annually to improve air circulation and reduce crowding
  • Divide overgrown clumps in early spring for propagation and to refresh growing medium
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No documented toxicity to cats

Humans: No documented toxicity to humans

📖

Garden Uses & Culture

Culture: N/A

Usage: Shade garden ground cover; native woodland habitat restoration