Kenya’s Insect Fertiliser Shift Turns Soil Recovery Into a Business Opportunity

Kenyan farmers turning redworms and black soldier fly larvae into fertiliser are showing how soil recovery can become both a food-security response and a business opportunity. Africanews reported on August 26, 2026 that farmers in Kenya are using insect and worm-based compost to reverse soil degradation, reduce dependence on costly chemical inputs and meet rising demand for organic food.

The shift is taking place against a serious regional soil crisis. Africanews, citing a 2025 Heinrich Boll Foundation soil report, said more than 40% of East Africa’s soils are degraded, costing more than US$65 billion a year in lost productivity. In Kenya, 32% of cropland was classified as strongly acidic, with intensive farming, climate stress and overuse of chemical fertilisers among the causes.

That is why insect fertiliser matters beyond one farm. For many African producers, the key problem is not only access to land or rainfall. It is soil exhaustion. When soils lose organic matter, microbial life and water-retention capacity, farmers can spend more on inputs while harvesting less. Organic fertiliser made from waste offers a practical route to rebuild soil health while creating new rural and peri-urban enterprises.

What Kenyan farmers are doing

Africanews highlighted the case of George Muturi Kamau, a farmer in Lari, about 50 kilometres from Nairobi, who uses redworms to turn food waste, crop waste and cow dung into vermicompost. He said the system helped rescue his land from degradation linked to chemical fertilisers and improved his ability to sustain crops even during dry periods.

His operation uses beds filled with thousands of redworms that break down organic material over several weeks. The result is a nutrient-rich compost that can improve soil structure, organic matter and water retention. Muturi now sells compost to other farmers, showing how soil restoration can create a commercial product, not only an on-farm input.

In Nakuru County, Robert Mwangi is using black soldier fly larvae. He collects organic waste from the city’s main market and feeds it to larvae, which break down the material into frass, an organic fertiliser. Mature larvae are then dried and used as animal feed. That gives the model two revenue channels: fertiliser for crops and protein feed for livestock or aquaculture.

Why soil acidity matters

Soil acidity is a major productivity constraint in Kenya and across parts of East Africa. When soils become too acidic, crops struggle to absorb nutrients even when farmers apply fertiliser. The result is a frustrating cycle: farmers use more synthetic inputs, costs rise, yields stagnate and soil biology continues to weaken.

Africanews reported that agro-ecologist Harun Warui views vermicompost as a way to reduce dependence on synthetic inputs by supporting broader soil biology. That point is critical. Chemical fertilisers can provide specific nutrients, but they do not automatically restore the biological systems that make soils resilient.

Organic matter supports microorganisms, improves water retention and helps soil structure. In a climate-stressed region where rainfall is becoming less predictable, water retention is not an academic detail. It can determine whether crops survive dry spells.

The business case

Insect-based fertiliser is not only a sustainability idea. It has a business case. Farmers and entrepreneurs can collect food waste, crop residue and market waste that would otherwise create disposal problems, then convert it into compost, frass and animal feed.

A 2026 open-access study in Discover Agriculture examined black soldier fly technologies for organic waste recycling into fertiliser in Kenya. The study found that adoption was influenced by access to recycling information, membership in waste-management groups and the perception that recycled products can be diversified. In other words, farmers are more likely to adopt insect-based systems when they understand both the agronomic and commercial benefits.

The study focused on Kiambu County and compared black soldier fly recycling with conventional composting. It adds scientific support to what farmers are testing in practice: organic waste can become an input for soil health and a product with market value.

Waste is part of the solution

Kenya’s cities and markets generate large volumes of organic waste. Poorly managed waste can clog drainage, emit odours, attract pests and produce methane. Insect farming changes the economics of that waste. Instead of treating it only as a municipal burden, entrepreneurs can turn it into feedstock for fertiliser and protein.

This is important for African cities because waste management and agriculture are usually handled separately. Yet they are connected. Urban food waste can feed insect systems. Insect systems can produce fertiliser for peri-urban and rural farms. Better soils can produce more food for cities.

The circular-economy logic is strong. But it requires standards, training and market trust. Farmers need confidence that insect-based fertilisers are safe, consistent and effective. Regulators need quality standards to prevent poor products from damaging the sector’s reputation.

Limits and challenges

The model is promising, but it is not a complete replacement for all synthetic fertiliser. Muturi acknowledged in the Africanews report that vermicompost is still far from industrial-scale substitution because large quantities are needed to match the nutrient intensity of synthetic products. That is an important reality check.

For many farmers, the best path may be integrated soil fertility management: combining organic matter, soil testing, appropriate mineral fertiliser, crop rotation, legumes, compost and water conservation. The goal is not ideology. The goal is resilient productivity.

Scaling insect fertiliser also requires labour, space, knowledge, waste supply, hygiene management and access to buyers. Not every smallholder can run an insect-recycling operation alone. Cooperatives, youth enterprises, county programmes and private companies may be better placed to aggregate production.

Why this matters for food security

Food security depends on more than emergency grain imports. It depends on healthy soils, affordable inputs and stable yields. If soil degradation continues, farmers can become trapped between rising costs and declining productivity. That weakens household income and national food supply.

Kenya is not alone. Many African countries face similar soil-health constraints after years of nutrient mining, erosion, monocropping and limited organic replenishment. Climate shocks make the problem worse. Farmers need solutions that increase soil resilience while remaining affordable.

Insect-based fertiliser is attractive because it uses local waste, local labour and biological processes. It is not dependent on imported chemical inputs in the same way as conventional fertiliser markets. That can reduce exposure to global price shocks, including energy disruptions and shipping costs.

Policy implications

Kenyan county and national authorities should treat insect fertiliser as part of a broader soil-health strategy. That means supporting training, quality standards, research, extension services and market access. It also means connecting waste-management policy with agriculture policy.

Farmers need soil testing so they know when organic compost is enough and when additional nutrients are needed. Entrepreneurs need clear rules for handling market waste, producing frass and selling fertiliser. Researchers need funding to measure yield effects across crops, soils and seasons.

The government should also support data collection. If insect fertiliser improves yields, water retention and soil biology, those benefits should be documented in ways that lenders, insurers and buyers can trust.

What should happen next

First, Kenya should expand farmer training on vermicompost, black soldier fly frass and integrated soil fertility management. Adoption depends on practical knowledge, not only awareness.

Second, counties should link market-waste collection with certified organic fertiliser producers. Waste supply is a major input.

Third, regulators should create and enforce quality standards for insect-based fertilisers and animal feed. Trust will decide market growth.

Fourth, financing should support small and medium enterprises that can scale production and distribution. Many farmers may buy compost rather than produce it themselves.

Fifth, research institutions should keep testing soil and yield impacts so farmers can make evidence-based decisions.

The bottom line

Kenya’s insect fertiliser shift is a practical African innovation built from local waste, farm necessity and rising demand for healthier soils. It will not solve every fertiliser problem, but it can reduce pressure on degraded land and create new income streams.

The bigger lesson is that Africa’s food-security future depends on soil systems, not only seeds and rainfall. Farmers need affordable tools that restore fertility rather than exhaust it.

Redworms and black soldier fly larvae may look like a small solution. In the right policy and business environment, they can become part of a much larger transformation in African agriculture.

Sources

• Africanews / AFP – Kenyan farmers use fertiliser made by bugs to reverse soil degradation, 26 August 2026
• NTA – Kenyan farmers turn to worms and bugs as organic demand grows, 26 August 2026
• Discover Agriculture – Adoption, determinants, and economic efficiency of insect-based technologies for organic waste recycling into fertilizer in Kenya, 29 May 2026
• AGRA – From Fighter Jets to Maggots: How Janiffer Muthike is turning waste into a soil revolution, 29 July 2026
• Kenya News Agency – Smart farming app turns soil data into better harvests, 15 January 2026