Dimorphic Spleenwort (Asplenium dimorphum)

Dimorphic Spleenwort

Asplenium dimorphum

Its fronds split into two distinct forms, a quiet fern for shaded nooks. Evergreen epiphytic fern; common name: dimorphic spleenwort.

Low light
1–2/week
Beginner
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Plant Needs

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Sunlight Thrives in bright indirect or low shade; avoid direct sunlight which can scorch fronds
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Watering Keep growing medium consistently moist but not waterlogged; avoid allowing the medium to dry out completely
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Temperature Prefers mild, stable temperatures; avoid sudden drafts or extreme heat above 28°C
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Characteristics

  • Frond: Dimorphic; sterile fronds are broad, rounded, and evergreen; fertile fronds are narrower, upright with spore clusters on undersides
  • Root: Rhizomatous, forms tight clumps to anchor to tree trunks or rocky surfaces
  • Habit: Epiphytic, grows in shaded, humid microclimates
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Care Guide

Watering

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

Fertilization

Diluted balanced liquid feed once every 2 months. Avoid over-fertilizing to prevent frond burn

Spent tea leaf compost:Steep fully dried spent black tea leaves in water for 24 hours, dilute 1:10, and use as a root drench to avoid nutrient buildup
Pruning
  • Trim brown or damaged fronds at the base to maintain a tidy appearance
  • Remove dead rhizome material to improve airflow around the root clump
  • Divide overcrowded clumps in early spring for propagation
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental epiphyte for terrariums, hanging baskets, or shaded garden walls