Unicorn Rush (Juncus effusus 'Unicorn')

Unicorn Rush

Juncus effusus 'Unicorn'

Its fine, arching stems create soft, cloud-like texture. Ornamental grass-like perennial; common name: Unicorn Rush.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Thrives in full sun to partial shade; variegation remains bright with consistent sunlight exposure
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Watering Keep soil consistently moist; tolerates shallow standing water in bog or pond settings
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Temperature Hardy to freezing temperatures; withstands mild summer heat without significant stress
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Characteristics

  • Leaf: Reduced to basal sheaths; stems serve as primary photosynthetic structures, fine, bright green with creamy white variegation
  • Flower: Small, brownish-green blooms clustered in dense terminal heads
  • Stem: Slender, cylindrical, upright-arching variegated stems forming dense clumps
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Care Guide

Watering

Keep soil continuously moist; can grow in up to 5 cm of standing water

Fertilization

Diluted balanced feed once monthly. Avoid over-fertilization to prevent loss of variegation

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to support strong stem growth without disrupting variegation
Pruning
  • Remove brown, dead stems in early spring to encourage new, healthy growth
  • Thin overcrowded clumps every 2–3 years to improve air circulation
  • Trim back faded flower heads to maintain a tidy, compact appearance
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental groundcover for moist areas; container plantings for patio or indoor display