Job's Tears
Coix Lacryma-jobi
Job's Tears, or Coix Lacryma-jobi, is a unique and versatile plant known for its tear-shaped seeds. Originating from tropical Asia, it is often grown for its ornamental value and traditional uses in crafts. This resilient plant thrives in various conditions, making it a favorite among gardeners.
Everything it needs
9 essentials at a glance
Watering
Job's Tears prefers consistently moist soil but can tolerate short periods of dryness.
Water thoroughly when the top inch of soil feels dry, typically every 1-2 weeks. In hotter months, increase frequency to once a week. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause browning leaf tips and wilting.
Light
Job's Tears thrives in full sun to partial shade.
Ideally, it should receive at least 6 hours of direct sunlight daily. While it can tolerate some shade, too much can inhibit growth and flowering. Ensure it is placed where it can enjoy morning sun and some afternoon shade in hotter climates.
Soil
This plant prefers well-draining, loamy soil with a pH range of 6.0 to 7.0.
A mix of potting soil, sand, and perlite can enhance drainage. It is crucial to avoid heavy clay soils that retain water, as this can lead to root rot.
Humidity
Job's Tears enjoys moderate to high humidity levels, ideally around 50-70%.
To increase humidity, mist the leaves regularly or use a humidity tray filled with water and pebbles. Signs of low humidity include browning leaf edges and stunted growth.
Temperature
The ideal temperature range for Job's Tears is between 65°F to 85°F (18°C to 29°C).
It is hardy in USDA zones 8-11. While it can tolerate brief periods of cooler temperatures, prolonged exposure below 50°F (10°C) can damage the plant.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 during the growing season, applying every 4-6 weeks.
In fall and winter, reduce feeding as the plant enters dormancy. Signs of nutrient deficiency include yellowing leaves and poor growth.
Pruning
Prune Job's Tears in early spring to remove dead or damaged leaves and to encourage new growth.
Use sharp, clean scissors or pruning shears. Deadheading spent flowers can promote further blooming and maintain a tidy appearance.
Repotting
Repot Job's Tears every 1-2 years or when it becomes root-bound, indicated by roots growing out of the drainage holes.
Choose a pot 1-2 inches larger in diameter. Carefully remove the plant, loosen the roots, and place it in fresh soil, ensuring the crown is at the same soil level.
Propagation
Job's Tears can be propagated through seeds or division.
For seed propagation, plant seeds in spring, 1 inch deep in moist soil. Keep the soil warm and consistently moist until germination, which takes about 2-4 weeks. For division, carefully separate clumps in early spring and replant immediately.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering or nutrient deficiency.
How to fix it
Check soil moisture and adjust watering habits. Fertilize with a balanced fertilizer if nutrient deficiency is suspected.
Browning leaf tips
Why it happens
Typically a sign of underwatering or low humidity.
How to fix it
Increase watering frequency and mist the leaves to raise humidity levels.
Root rot
Why it happens
Caused by overly saturated soil and poor drainage.
How to fix it
Ensure proper drainage and reduce watering frequency. If root rot occurs, remove affected roots and repot in fresh soil.
Pests (aphids, spider mites)
Why it happens
Pests can infest the plant, especially in dry conditions.
How to fix it
Inspect regularly and treat with insecticidal soap or neem oil as needed.
Stunted growth
Why it happens
Can be due to insufficient light or nutrient deficiency.
How to fix it
Move the plant to a brighter location and ensure proper fertilization.
Care through the year
Spring
In spring, prune back any dead leaves and prepare for new growth. Fertilize with a balanced fertilizer to promote healthy development.
Summer
During summer, ensure consistent moisture and monitor for pests. Increase watering frequency as needed, especially in hot weather.
Fall
In fall, reduce watering as the plant prepares for dormancy. Continue to fertilize until late fall, then stop feeding.
Winter
In winter, protect Job's Tears from frost and cold drafts. Reduce watering and keep the plant in a bright location to maintain some growth.
Toxicity & Safety
Job's Tears is non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal discomfort. The seeds are often used in traditional crafts, so keep them out of reach of small children.
Good to know
Why are my Job's Tears leaves turning yellow?
Yellowing leaves can indicate over-watering or a nutrient deficiency. Check the soil moisture and adjust your watering schedule accordingly.
How often should I water my Job's Tears?
Water Job's Tears when the top inch of soil feels dry, typically every 1-2 weeks. Increase frequency during hot weather.
What light conditions do Job's Tears prefer?
Job's Tears thrive in full sun to partial shade, needing at least 6 hours of direct sunlight daily for optimal growth.
How do I propagate Job's Tears?
You can propagate Job's Tears from seeds or by division. For seeds, plant them in spring; for division, separate clumps in early spring.
What type of soil is best for Job's Tears?
Job's Tears prefer well-draining, loamy soil with a pH of 6.0 to 7.0. A mix of potting soil, sand, and perlite works well.
How can I increase humidity for my Job's Tears?
To increase humidity, mist the leaves regularly or place a humidity tray filled with water and pebbles near the plant.
When should I repot my Job's Tears?
Repot Job's Tears every 1-2 years or when it becomes root-bound, indicated by roots growing out of the drainage holes.
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