Corkscrew Rush (Juncus effusus 'Spiralis')

Corkscrew Rush

Juncus effusus 'Spiralis'

Its twisted stems coil like living springs, softening hard edges. Evergreen ornamental grass; common name: Corkscrew Rush.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect to partial sun; tolerates full sun in cool temperate regions, avoid intense midday sun in hot climates
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Watering Keep soil consistently moist; can grow in 2–5 cm of standing water, do not allow substrate to dry out completely
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Temperature Hardy to -10°C for short periods; prefers cool to temperate conditions, avoid prolonged temperatures above 28°C
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Characteristics

  • Leaf: Reduced to basal sheaths; stems serve as primary foliage, forming tightly spiraled green cylinders
  • Flower: Tiny brownish-green clustered blooms at stem tips; non-showy
  • Stem: Slender, corkscrew-shaped green stems that form dense, mounded clumps
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Care Guide

Watering

Maintain constant moisture; can grow in shallow standing water

Fertilization

Diluted balanced feed once every 2 months. Avoid over-fertilizing to prevent excessive, weak stem growth

Banana peel compost tea:Use fully composted banana peels, dilute 1:20 with water for root drench; discard solid debris to avoid mold or pest issues
Pruning
  • Trim browned stem tips to preserve tidy clump appearance
  • Divide overcrowded clumps in early spring to propagate and refresh growth
  • Remove dead or damaged stems annually to encourage new, healthy growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified 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: Symbolizes resilience and adaptability to wet growing conditions

Usage: Bog garden accent, water feature edge planting, indoor container ornamental