Vermicompost

Worm-worked compost applied to smallholder vegetable plots to rebuild soil organic matter.

Worm-worked compost applied to smallholder vegetable plots to rebuild soil organic matter.

Kenya

Horticulture Crops

Improved Soil Health

Impact Highlights

2,400+

2,400+

Farmers trained

~35%

~35%

Lower fertilizer spend

180

180

Tonnes of waste diverted

Summary

Practice snapshot

Practice

Vermicompost production

Implementin Organization

To be confirmed — placeholder for the implementing organisation.

Geography

Kenya, Uganda

Crops / Value Chain

Horticulture

Adoption & outcomes

Farmers Reached

2,400

2026

Core Outcomes

Improved Soil Health

Land Tenure

Land Tenure

Gender Participation

Gender Participation

Practitioner Languages

English, Kiswahili

Date Submitted

August 2026

How to Adopt

1

Identify a starter group

Identify a starter group

Begin with 15–25 households that already handle crop residue or livestock manure and have space for a shaded worm bed.

Begin with 15–25 households that already handle crop residue or livestock manure and have space for a shaded worm bed.

2

Source worms and materials

Source worms and materials

Secure a reliable supply of composting worms along with the timber, shade netting, and bedding each bed requires.

Secure a reliable supply of composting worms along with the timber, shade netting, and bedding each bed requires.

3

Build and stock together

Build and stock together

Construct and stock the beds with the group, so the technique is learned by doing rather than by instruction.

Construct and stock the beds with the group, so the technique is learned by doing rather than by instruction.

4

Support the first cycle

Support the first cycle

Visit through the first full cycle to correct moisture and feeding problems, then help the group plan applications and any surplus sales.

Visit through the first full cycle to correct moisture and feeding problems, then help the group plan applications and any surplus sales.

Key Takeaways

Recommendations for Successful Farmer Adoption

  • Seed adoption through group-run demonstration beds rather than individual training sessions.

  • Plan for dry-season shade and water access before beds are built.

  • Position castings as a supplement to existing inputs so expectations stay realistic.

  • Support a local market for surplus castings to give the practice an income case.

Pitfalls and Implementation Risks

  • Promising fertilizer replacement when realistic volumes only allow supplementation.

  • Distributing worm stock without also securing shade and water access.

  • Underestimating the labour cost at peak planting and weeding periods.

  • Reporting farmer-perceived gains as measured outcomes without independent evaluation.

Economics Snapshot

Key financial metrics

Average cost per hectare for program

12,400

Average cost per hectare to farmer

100%

Average farmer income gain

18%

More case studies.

More case studies.

Regenerative and climate-smart practices, direct from practitioners working with smallholders.

Regenerative and climate-smart practices,
direct from practitioners working with smallholders.

Regenerative and climate-smart practices, direct from practitioners working with smallholders.

Climate Action for Smallholders (CASH) Coalition Inc. is registered as a 501(c)(3) organization in the United States.

Climate Action for Smallholders (CASH) Coalition Inc. is registered as a 501(c)(3) organization in the United States.

Climate Action for Smallholders (CASH) Coalition Inc. is registered as a 501(c)(3) organization in the United States.