Job's Tears (Coix lacryma-jobi)

Job's Tears

Coix lacryma-jobi

Hardy grass with bead-like fruits, blending utility and quiet charm. Annual or perennial grass; common name: Job's Tears.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; full sun promotes maximum fruiting, while partial shade suits hot, arid regions
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Watering Keep soil consistently moist during active growth; avoid waterlogging to prevent root rot
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Temperature Thrives in warm temperate to tropical conditions; tolerates light frost once established
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Characteristics

  • Leaf: Linear, elongated blades (10–40 cm long), bright to medium green, parallel venation
  • Flower: Inconspicuous spikelets; male flowers positioned above female flowers on the same inflorescence
  • Fruit: Hard, pearly white, bead-like caryopsis enclosed in a rigid, shell-like husk
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Care Guide

Watering

Keep soil evenly moist; water deeply when the top 2 cm of soil feels dry

Fertilization

Diluted balanced liquid feed every 2 weeks. Discontinue fertilization in late autumn to prepare for dormancy

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench; discard solids to prevent odor and pest attraction
Pruning
  • Trim yellowing or damaged leaves regularly to maintain tidy clumps
  • Cut back spent flower stalks after fruiting to encourage new growth
  • Thin overcrowded clumps in early spring to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirms no toxicity to cats

Humans: No known toxic effects on humans; seeds are edible when processed

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Garden Uses & Culture

Culture: Symbolizes protection and good fortune in some Southeast Asian traditional practices

Usage: Ornamental grass; edible seeds used in traditional medicine, cuisine, and craftwork