Dwarf Hairgrass (Eleocharis elegans)

Dwarf Hairgrass

Eleocharis elegans

Delicate, grass-like foliage creates soft, carpet-like ground cover. Semi-aquatic herbaceous perennial; common name: Dwarf Hairgrass.

Partial sun
3–5/week
Beginner
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Plant Needs

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Sunlight Bright, indirect light supports dense growth; tolerates moderate shade in semi-aquatic bog setups
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Watering Keep substrate consistently moist for semi-aquatic use; maintain full submersion for aquarium cultivation
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Temperature Thrives in warm, stable temperatures; avoid sudden drops below 12°C to prevent foliage decline
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Characteristics

  • Leaf: Slender, bright green linear blades resembling fine grass, growing upright from rhizomes
  • Stem: Smooth, hollow upright stems topped with tiny brown, cylindrical spikelets
  • Root: Fibrous, creeping rhizomatous root system that spreads to form continuous mats
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Care Guide

Watering

Maintain consistent moisture or full submersion to support active growth

Fertilization

Add diluted liquid aquatic fertilizer monthly. Avoid over-fertilizing to prevent excessive algae growth in aquatic environments

Established aquarium water runoff:Use water from monthly fish tank water changes to provide natural, gentle nutrients without chemical additives
Pruning
  • Trim overgrown foliage to maintain desired height and uniform mat density
  • Remove yellowing or decaying blades to prevent nutrient waste and maintain water quality
  • Thin dense rhizome mats occasionally to improve water circulation in aquatic setups
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic to cats; no reported toxicity

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: Aquarium foreground ground cover, bog garden ornamental, semi-aquatic landscaping