Wall Rue (Asplenium ruta-muraria)

Wall Rue

Asplenium ruta-muraria

Delicate, ferny foliage clings to stone cracks like living lace. Evergreen epiphytic fern; common name: Wall Rue.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; tolerates partial shade, avoid harsh midday direct sun that can scorch fronds
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Watering Keep growing medium consistently moist but not waterlogged; mist fronds regularly to maintain ambient humidity
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Temperature Thrives in cool to temperate conditions; avoid extreme heat above 28°C and prolonged frost below 0°C
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Characteristics

  • Frond: Triangular, finely divided, leathery evergreen fronds with small, rounded leaflets
  • Sori: Brown, linear spore clusters on underside of mature fronds
  • Rhizome: Short, creeping rhizome with brown scales for anchorage
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Care Guide

Watering

Keep substrate evenly moist; mist fronds 2–3 times weekly to boost humidity

Fertilization

Diluted liquid fern feed once monthly. Use a balanced, low-strength fertilizer to avoid burning delicate root systems

Banana peel compost tea:Use fully composted banana peels; dilute 1:20 with water for root drenching to avoid nutrient buildup
Pruning
  • Remove brown, dead fronds at the base to maintain a tidy appearance
  • Thin overcrowded clumps in early spring to improve airflow and reduce competition for nutrients
  • Trim damaged or discolored fronds to redirect energy to healthy growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic; no known adverse effects on cats

Humans: Non-toxic; safe for handling and accidental ingestion in small amounts

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Garden Uses & Culture

Culture: Symbolizes resilience for its ability to grow in rocky, nutrient-poor environments

Usage: Ornamental plant for rock gardens, vertical wall planters, and closed terrariums