Spiral Grass (Trachyandra tortilis)

Spiral Grass

Trachyandra tortilis

Its leaves curl into tight spirals like a living spring. Succulent perennial herb; common name: spiral grass.

Partial sun
1/week
Moderate
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Plant Needs

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Sunlight Bright indirect light; tolerate partial shade, avoid intense midday direct sun to prevent leaf scorching
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Watering Allow the soil to dry completely between waterings to avoid tuber rot; reduce frequency in winter dormancy
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Temperature Thrives in 15–25°C; protect from frost below 10°C to prevent tuber damage
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Characteristics

  • Leaf: Narrow linear leaves that spiral tightly upwards from a basal rosette; bright green, fleshy, and rigid texture
  • Flower: Small, star-shaped white to pale pink blooms on thin, erect flowering stems reaching 30–40 cm tall
  • Root: Tuberous underground root system adapted for water storage during dry periods
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Care Guide

Watering

Water thoroughly when the top 2–3 cm of soil is fully dry

Fertilization

Diluted low-nitrogen succulent fertilizer once monthly. Do not fertilize during winter dormancy to avoid stressing the tuber

Eggshell powder topdress:Crush dried, rinsed eggshells into fine powder; sprinkle thinly on the soil surface to avoid attracting pests
Pruning
  • Remove yellowed or damaged leaves at the base to maintain a tidy rosette appearance
  • Trim spent flowering stems after blooms fade to conserve tuber energy
  • Avoid cutting healthy spiral leaves, as they do not regrow once damaged
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental succulent for windowsill collections and small container gardens