North America Non-native Plant

Job’s Tears

Botanical name: Coix lacrymajobi

USDA symbol: COLA

Life cycle: annual

Habit: grass

Native status: Non-native, reproduces and persists in the wild in Hawaii âš˜ Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Pacific Basin excluding Hawaii âš˜ Non-native, reproduces and persists in the wild in Puerto Rico âš˜ Non-native, reproduces and persists in the wild in the U.S. Virgin Islands  

Job’s Tears: The Quirky Grass That Makes Natural Jewelry If you’ve ever wanted to grow your own jewelry, Job’s tears (Coix lacrymajobi) might just be the plant for you! This distinctive ornamental grass produces hard, bead-like seeds that have been used for thousands of years to make necklaces, bracelets, and ...

Job’s Tears: The Quirky Grass That Makes Natural Jewelry

If you’ve ever wanted to grow your own jewelry, Job’s tears (Coix lacrymajobi) might just be the plant for you! This distinctive ornamental grass produces hard, bead-like seeds that have been used for thousands of years to make necklaces, bracelets, and decorative items. But there’s more to this unique grass than just its crafting potential.

What Exactly is Job’s Tears?

Job’s tears is a fascinating grass that can grow as either an annual or perennial, depending on your climate. Native to Southeast Asia, this graminoid (grass-like plant) has made itself at home in many warm regions around the world. The plant gets its common name from its distinctive seeds, which are shaped like teardrops and have a hard, glossy finish that makes them perfect for crafting.

Where You’ll Find Job’s Tears Growing

This adaptable grass has established itself across several U.S. states and territories, including Hawaii, Louisiana, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Texas, Guam, Palau, Puerto Rico, and the Virgin Islands. As a non-native species that reproduces and persists without human intervention, it’s found a comfortable niche in these warmer regions.

The Wet and Wild Side of Job’s Tears

One thing that makes Job’s tears particularly interesting is its love affair with water. This grass has varying wetland preferences depending on where it grows:

  • In most regions, it’s classified as Facultative Wetland, meaning it usually prefers wet areas but can tolerate drier conditions
  • In the Caribbean, it’s considered Obligate Wetland, almost always found in wet environments
  • This flexibility makes it excellent for water gardens, bog areas, or consistently moist landscape spots

Should You Grow Job’s Tears in Your Garden?

The decision to grow Job’s tears depends on your gardening goals and location. Here are some considerations:

Reasons you might want to grow it:

  • Unique ornamental value with interesting seed heads
  • Natural craft material source
  • Thrives in wet areas where other plants struggle
  • Low-maintenance once established
  • Adds tropical flair to gardens

Things to consider:

  • It’s non-native and can self-seed readily
  • May not provide significant benefits to local wildlife
  • Requires consistent moisture to thrive

Growing Job’s Tears Successfully

If you decide to give Job’s tears a try, here’s what you need to know:

Climate and Hardiness: Job’s tears thrives in USDA zones 9-11 but can be grown as an annual in cooler areas. It loves warm weather and won’t tolerate frost.

Light Requirements: Full sun to partial shade works well, though full sun typically produces the best growth and seed production.

Soil and Water: This grass is happiest in consistently moist to wet soils. It’s perfect for rain gardens, pond edges, or areas with poor drainage that challenge other plants.

Planting Tips:

  • Start from seed in spring after the last frost
  • Soak seeds for 24 hours before planting to improve germination
  • Plant in groups for better visual impact
  • Space plants 12-18 inches apart
  • Keep soil consistently moist during establishment

Maintenance and Care

Job’s tears is refreshingly low-maintenance once established. Water regularly during dry spells, and the plant will pretty much take care of itself. In colder zones, treat it as an annual and collect seeds for next year’s planting. The plant can reach 3-6 feet tall and 2-3 feet wide, so give it adequate space.

Consider Native Alternatives

While Job’s tears can be an interesting addition to the right garden, consider native grasses that provide similar ornamental value while supporting local ecosystems. Depending on your region, options might include native sedges, wild rice, or other indigenous wetland grasses that offer habitat for local wildlife while providing unique textures and forms.

Whether you’re drawn to Job’s tears for its crafting potential, unique appearance, or ability to thrive in soggy spots, this distinctive grass can add an unexpected element to the right garden setting. Just remember to be mindful of its non-native status and consider how it fits into your overall landscape goals.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Atlantic and Gulf Coastal Plain

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Caribbean

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Eastern Mountains and Piedmont

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Great Plains

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Hawaii

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Midwest

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Northcentral & Northeast

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Job’s Tears

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Coix L. - Job's tears

Species

Coix lacryma-jobi L. - Job's tears

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA