Cashew nut production in Kenya has declined significantly over the past two decades, falling from nearly 19,000 tonnes annually to approximately 13,000 tonnes today. This drop occurred while installed processing capacity in Kilifi and Kwale counties reached 45,000 tonnes, meaning local processors currently operate well below their potential. For farmers and agribusiness investors, this gap represents both a warning and an opportunity.

The warning is clear: past challenges including poor variety selection, disease pressure, and weak market linkages have discouraged farmers. Many abandoned cashew for other crops or cut down old, unproductive trees entirely. The opportunity is equally clear. Processing companies need raw material. The government, through the Kenya Agricultural and Livestock Research Organisation (KALRO) and the Agriculture and Food Authority (AFA), has released improved disease-tolerant varieties. And the export market for Kenyan cashew kernels shows steady demand, with prices recovering from previous lows.

This guide provides practical information for farmers and investors evaluating cashew. It covers the varieties now available, the realistic timeline to production, establishment and maintenance costs per acre, expected yields, current market channels, and the genuine challenges you should plan for before planting.

Understanding the Cashew Tree

Botanical and Production Characteristics

The cashew tree (Anacardium occidentale) is an evergreen tropical tree that reaches 10 to 15 metres at maturity. Its deep root system makes it naturally drought-tolerant, and it thrives in warm lowland conditions with a distinct dry season. The tree produces both the cashew nut, which hangs below a fleshy cashew apple. The apple is edible and can be processed into juice or dried products, though most Kenyan farmers currently focus only on the nut.

A well-managed cashew tree remains productive for 20 to 30 years, with some trees continuing for 40 years or more. This long lifespan spreads establishment costs over decades, making cashew a genuinely long-term investment. However, the tree requires patience during the first three to four years before commercial yields begin.

Climate and Soil Requirements

Cashew is not suitable for every part of Kenya. Before investing, confirm that your land meets these basic requirements.

Temperature is the most critical factor. Cashew requires warm conditions between 20°C and 32°C. Temperatures below 15°C for extended periods reduce flowering and nut development. This restricts commercial production to lowland areas.

Altitude should be below 800 metres above sea level. In Kenya, this means the coastal counties of Kilifi, Kwale, Lamu, Mombasa, and Taita Taveta. Some lower-altitude areas in Eastern Province, including parts of Kitui, Makueni, and Tharaka Nithi below 900 metres, can support cashew, though yields generally run lower than at the coast. Farmers above 1,000 metres should not plant cashew; the trees will survive but produce poorly.

Rainfall between 600 and 1,200 millimetres annually is suitable. A distinct dry season of three to four months is essential for triggering flowering. Too much rain during flowering reduces pollination and encourages fungal diseases.

Soil should be deep, well-drained, and not waterlogged. Cashew tolerates sandy soils, coastal red laterites, and even poor or rocky ground better than most fruit trees. Heavy clays and areas with poor drainage are unsuitable. The preferred soil pH range is 5.5 to 7.5.

Best Growing Regions in Kenya

Production is concentrated in the coastal belt where conditions match the tree’s requirements. Kilifi County has the largest planted area, the most established processing facilities, and active farmer cooperatives. Kwale County follows closely, with both county government and private sector programmes supporting new plantings. Lamu and Taita Taveta counties have traditional production zones included in the current revival efforts. Mombasa serves primarily as a processing hub rather than a growing area.

The government has announced plans to distribute seedlings to Eastern and Western regions as well, but farmers in these areas should be cautious. Cashew performs best at the coast. Inland areas at the edge of the tree’s altitude range will likely produce lower yields and may experience more variable flowering.

Recommended Cashew Varieties for Kenya

Selecting the right variety is the most important decision you will make. Improved grafted varieties outperform traditional seedling trees in every measurable way: earlier bearing, higher yields, better nut quality, and often improved disease tolerance.

New KALRO Disease-Tolerant Variety

KALRO’s Mtwapa Centre, which focuses specifically on cashew research, has released a new disease-tolerant variety. According to available information, this variety doubles yields compared to traditional types and addresses farmer complaints about powdery mildew and other fungal diseases. As of early 2026, 20,000 seedlings of this variety had been released for distribution. Farmers in coastal counties should prioritise this variety where available.

AC4

This hybrid variety is recommended for high nut yield and large nut size. AC4 produces 8 to 12 kilogrammes per tree at maturity, with individual nuts weighing 6 to 8 grammes. The large nut size is attractive to export markets. Grafted AC4 trees begin fruiting in the second or third year after planting.

AC10

This variety is early-maturing and drought-tolerant, making it suitable for drier areas within the coastal region and for inland areas like Makueni and Kitui that receive less reliable rainfall. AC10 yields 7 to 10 kilogrammes per tree. It is a good choice for farmers without irrigation access.

AZA2

This variety produces medium-sized nuts but has an unusually high cashew apple yield of 20 to 30 kilogrammes per tree. It is intended for dual-purpose farming where farmers want to utilise both the nut and the apple for juice, wine, or dried products. If you have no plans to process or sell apples, choose AC4 or the KALRO variety instead.

Grafted Versus Seed-Grown Trees

Always purchase grafted seedlings from certified sources. Grafted trees fruit in two to three years, compared to four to six years for seed-grown trees. Grafting onto local rootstock also enhances drought tolerance and disease resistance. Seed-grown trees are highly variable; some may never produce well. The higher upfront cost of grafted seedlings pays back many times over through earlier production and better yields.

Land Preparation and Planting

Field Preparation

Clear the land of bushes, weeds, and any remaining stumps. If you are replanting on land where old cashew trees have been removed, take care to pull out or rot old roots to reduce disease pressure. Plough the land deeply to break any hardpans, then harrow to create a seedbed.

Spacing and Plant Population

Spacing determines how many trees you can plant per acre and affects yields for the life of the orchard. For improved varieties grown under good conditions, spacing of 8 metres by 8 metres is appropriate. This gives approximately 156 trees per acre. Some government recommendations suggest 10 metres by 10 metres (43 trees per acre), but this lower density significantly reduces per-acre revenue and is better suited to very poor soils or areas with extremely low rainfall. For most coastal farmers with reasonable soils, 8 metres by 8 metres balances tree development with land use efficiency.

Planting Holes

Dig holes 60 centimetres wide and 60 centimetres deep at least one month before planting. This allows the soil to settle and aerate. Separate the topsoil from the subsoil. Mix the topsoil with 15 to 20 kilogrammes of well-decomposed manure or compost per hole. For sandy coastal soils, this organic matter is essential for water and nutrient retention.

Seedling Costs and Planting Time

Certified grafted seedlings from reputable nurseries cost between KSh 150 and KSh 300 each, depending on variety and location. For one acre at 156 trees, seedling costs range from KSh 23,400 to KSh 46,800.

Plant at the beginning of the long rains (March to April) or the short rains (October to November). Remove the polythene bag carefully, ensuring the root ball remains intact. Place the seedling so the graft union sits 5 to 10 centimetres above ground level. Backfill with the soil-manure mixture, firm gently, and water thoroughly with 15 to 20 litres per tree. Apply mulch around the base, keeping the mulch a few centimetres away from the trunk to prevent rot.

Establishment Costs Per Acre

The following figures are approximate for a one-acre orchard at 156 trees using improved grafted seedlings. Actual costs vary by location, labour rates, and input prices.

Land preparation including ploughing, harrowing, and hole digging ranges from KSh 8,000 to KSh 12,000. Manure at 15 to 20 kilogrammes per hole requires approximately 2.5 to 3 tonnes total, costing KSh 6,000 to KSh 10,000 depending on local availability. Fertiliser (triple superphosphate or NPK at planting) adds KSh 3,000 to KSh 5,000. Seedlings at KSh 150 to KSh 300 each total KSh 23,400 to KSh 46,800. Labour for planting, mulching, and initial watering costs KSh 5,000 to KSh 8,000. Mulch material and stakes for young trees add KSh 2,000 to KSh 4,000.

The total first-year establishment cost per acre is approximately KSh 47,400 to KSh 85,800. These figures assume rain-fed production. Adding drip irrigation would increase costs significantly and is not essential for mature trees in areas with reliable rainfall.

Growth Timeline and Realistic Yields

Patience is essential with cashew. Even with improved grafted varieties, commercial production takes time. The timeline below describes typical development under good management.

In year one, the tree focuses on root and canopy development. Little to no nut production occurs. Remove any flowers that appear to direct energy into vegetative growth.

In year two, early flowering and nut set begin. A few nuts per tree can be expected. Do not count on meaningful income in year two.

In year three, yields increase to approximately 2 to 4 kilogrammes per tree. At 156 trees per acre, this gives 300 to 600 kilogrammes total.

In year four, yields reach 5 to 8 kilogrammes per tree, or 780 to 1,250 kilogrammes per acre.

From year five onward, mature production of 10 to 15 kilogrammes per tree is realistic under good management. This gives 1,500 to 2,300 kilogrammes of raw nuts per acre. Some varieties and well-managed orchards may reach 18 to 20 kilogrammes per tree, but 12 to 15 kilogrammes is a reasonable target for most smallholders.

Do not believe claims of 2,000 kilogrammes per acre from year three. Such figures require irrigation, intensive fertiliser programmes, and ideal conditions that most Kenyan farmers do not have.

Key Management Practices

Weed Control

Weeds compete with young trees for water and nutrients, particularly during the first three years. Maintain a weed-free circle of at least 1 metre radius around each tree. Slash weeds in the inter-row spaces rather than using herbicides, which can damage shallow cashew roots. Two to three weeding sessions per rainy season are usually sufficient.

Pruning

Pruning shapes the tree, removes diseased wood, and improves air circulation to reduce fungal diseases. In year one and two, allow a single main trunk to develop. Remove low branches below 1 metre. From year three onward, cut back branches that cross or rub against each other. Remove dead, diseased, or insect-infested wood immediately. Heavy pruning should happen during the dry season after harvest, not before flowering.

Fertiliser Application

Mature cashew trees do not require heavy fertilisation on most coastal soils, but responsive feeding increases yields. For young trees in years one to three, apply 100 to 200 grammes of NPK 15:15:15 per tree twice yearly at the start of the long and short rains. Apply 10 kilogrammes of manure per tree annually. For mature trees from year four onward, apply 200 to 500 grammes of NPK per tree twice yearly and 20 kilogrammes of manure per tree annually.

Irrigation

Established cashew trees tolerate dry spells of four to six months without irrigation. This is one of the tree’s greatest advantages. However, young trees need watering during dry periods. Apply 20 to 30 litres of water per tree every two weeks during the first two years if rains fail for more than one month. Mature trees only require irrigation if the dry season extends beyond six months or if annual rainfall drops below 600 millimetres.

Intercropping

The wide spacing of cashew allows intercropping during the first three years before canopies close. Suitable intercrops include drought-tolerant legumes such as cowpeas, green grams, and pigeon peas. Some farmers intercrop with coconuts or mangoes, though this creates permanent competition and is not recommended for commercial orchards focused on cashew. Annual intercrops provide income while waiting for cashew production to begin.

Common Pests and Diseases

Powdery Mildew

This fungal disease appears as white powdery patches on leaves, flowers, and young nuts. It thrives during cool, dry weather and can reduce yields significantly if untreated. Control by planting resistant varieties such as the new KALRO variety, ensuring proper spacing for air circulation, and applying sulphur-based fungicides when symptoms first appear. Neem-based sprays offer some suppression for smallholders.

Tea Thrips

These tiny insects feed on leaves and flower stalks, causing curling and premature flower drop. Damage is most severe during flowering. Monitor regularly during dry periods. Control with neem oil or pyrethrum-based insecticides. Severe infestations may require targeted synthetic insecticides, but apply these only after flowering to protect pollinators.

Stem and Root Borers

Larvae bore into the trunk and main branches, weakening trees and causing dieback. Prevention is the best approach. Keep trees healthy through proper nutrition and avoid wounding the bark during weeding. Remove and burn infested branches immediately. For severe infestations, inject insecticide into borer holes using a syringe, though this is labour-intensive for large orchards.

Squirrel and Rodent Damage

Rodents climb trees and feed on developing nuts, particularly during dry periods when other food is scarce. Control by keeping the orchard floor clean of fallen nuts, using metal bands around tree trunks to prevent climbing, and setting traps where damage is severe.

Market Opportunities and Realistic Pricing

Local Processing Companies

The most reliable market for raw cashew nuts is local processing companies. Several operate in Kilifi and Mombasa, and all are currently operating below capacity due to insufficient raw material. This demand pressure works in farmers’ favour.

Wondernuts Limited in Kilifi County has a processing capacity of 5,000 tonnes per year but currently processes only 2,000 tonnes, sometimes shutting down due to lack of nuts. The company has publicly encouraged farmers to engage in contract farming, guaranteeing a market for contracted produce.

East River Foods EPZ Limited, formerly Grow Fairly, has invested approximately USD 3 million in the cashew value chain. The company works with 15,000 farmers but notes that only 3,000 of those farmers have 50 trees or more, indicating the low scale of most current production.

Ten Senses Africa has invested Sh240 million to plant one million trees across Kilifi, Lamu, and Kwale counties. The company intends to buy nuts from farmers once trees begin producing.

Farm-Gate Prices

Farm-gate prices for raw, sun-dried nuts vary by season, quality, and negotiation power. In 2024 and 2025, prices ranged from KSh 80 to KSh 150 per kilogramme for properly dried nuts with good kernel fill. Wet nuts or nuts with low kernel weight fetch much less, sometimes as low as KSh 40 per kilogramme. Farmers selling through cooperatives typically receive better prices than those selling to middlemen.

Contact processors directly for current buying prices before planting. Contract farming arrangements provide guaranteed prices and off-take, reducing market risk.

Export Market Context

Kenya’s export price for cashew nuts reached USD 5,577 per tonne (approximately Sh720 per kilogramme) in 2023, marking a 13 percent increase. This represents the value of processed Kenyan cashew in international markets. Conversely, the average import price for raw nuts was USD 1,628 per tonne in the same year, reflecting the lower price at which Kenya imports raw nuts from Tanzania when local supply falls short. This gap demonstrates the value that processing adds.

The Cashew Apple Opportunity

Most Kenyan farmers waste the cashew apple, yet it has potential as a secondary income source. The apple can be processed into fresh juice, concentrate, wine, vinegar, or dried fruit snacks. In Brazil and India, cashew apple products generate substantial additional income. For Kenyan farmers near urban centres, selling fresh apples to juice processors or hotels adds KSh 10 to KSh 30 per kilogramme. However, apples bruise easily and spoil within 24 to 48 hours, so access to a nearby market or processing facility is essential.

Realistic Income Expectations Per Acre

The following projections are based on mature production from year five onward, using 8 metres by 8 metres spacing (156 trees per acre) and a conservative average yield of 10 kilogrammes per tree.

At 156 trees multiplied by 10 kilogrammes per tree, total yield is 1,560 kilogrammes of raw nuts per acre. At a farm-gate price of KSh 100 per kilogramme, gross revenue is KSh 156,000.

Annual maintenance costs include fertiliser (KSh 4,000 to KSh 8,000), manure (KSh 6,000), pest control (KSh 3,000 to KSh 6,000), and labour for weeding and harvesting (KSh 8,000 to KSh 15,000). Total annual costs range from KSh 21,000 to KSh 35,000.

Net profit per acre is approximately KSh 121,000 to KSh 135,000 per year from mature trees.

Under improved management with yields of 15 kilogrammes per tree, gross revenue reaches KSh 234,000, with net profit around KSh 199,000 to KSh 213,000 per acre.

These figures do not include cashew apple revenue, which could add KSh 5,000 to KSh 15,000 per acre if a market exists.

For context, an acre of mature cashew producing KSh 120,000 to KSh 200,000 net annually is respectable for a crop requiring no irrigation, minimal purchased inputs, and labour only during flowering, weeding, and harvest. However, the wait of four to five years before meaningful income begins is a real constraint that farmers must plan for.

Common Challenges and Practical Solutions

Low Farm-Level Production

Processors consistently cite low farm-level production as the sector’s biggest bottleneck. Most farmers have too few trees to attract consistent processor interest or to justify transport costs. The solution is to plant at least 50 trees, and preferably a full acre of 150 trees or more. Farmers who cannot plant that many on their own land should join farmer groups to aggregate production.

Seedling Affordability and Access

Even the subsidised price of Sh30 per seedling is unaffordable for some households, and last-mile delivery has gaps in some areas. Farmers should inquire about county-level subsidies, join farmer groups for collective purchasing, or consider top-grafting existing trees rather than replanting.

The Wait for Returns

At two to three years to first harvest and four to five years to commercial production, cashew requires more patience than annual crops. Intercropping during the first three years with fast-maturing annuals such as beans, cowpeas, or green grams provides income during the establishment phase.

Processing Requirement

Raw cashew nuts contain a toxic oil called CNSL (cashew nut shell liquid) that burns skin and must be removed before consumption. This makes on-farm processing difficult without equipment. Contract farming with processors eliminates the need for on-farm processing. For farmers wanting higher margins, the government has announced financing for small-scale processing units through youth and women enterprise funds, though availability should be verified locally.

Access to Extension Services

Gaps in extension support persist in some areas. Farmers can reach out directly to processors such as Wondernuts Limited and Ten Senses Africa, both of which provide extension services to contracted farmers. County agriculture departments are also scaling up support under the revival programme.

Long-Term Considerations for Farmers and Investors

Cashew fits best into a diversified farm system rather than as a sole crop. Its deep roots do not compete heavily with shallow-rooted annuals, so intercropping during the first three years works well. Once mature, the orchard requires less labour than most other permanent crops, freeing time for other farm activities.

Investors considering larger plantings should plan for scale. Processing profitability improves significantly above ten acres, where shared equipment or cooperative arrangements become viable. Land availability, labour for harvest (which is seasonal and concentrated over two to three months), and access to reliable buyers should all be assessed before planting large orchards.

The government’s revival programme includes plans to rehabilitate existing processing facilities in Kilifi and Kwale and to distribute two million improved seedlings. However, farmers should not rely on government support. Base your decisions on realistic market prices and your own ability to manage the orchard properly.

Practical Takeaways for Farmers

Start with a trial of 50 trees before committing to a full acre. This allows you to learn the growth patterns, flowering triggers, and pest pressures on your specific piece of land. Choose grafted seedlings of improved varieties from a certified source. Prepare your land thoroughly and mulch heavily during the first two years to reduce watering needs. Join a farmer cooperative if one exists in your area; collective marketing and shared learning are powerful advantages for cashew farmers. Establish a relationship with a processor before planting so you understand their quality requirements and buying terms. Plan for the first four years without significant cashew income by intercropping or maintaining other farm enterprises.

Making an Informed Decision About Cashew

Cashew nut farming in Kenya offers genuine long-term income potential, but it is not a quick return crop. The improved varieties now available address the old problems of low yields and long waiting periods. Processors need raw material and are actively seeking farmers. The export market for Kenyan cashew is stable and showing price recovery.

However, success requires the right piece of land in the right altitude zone, grafted seedlings of improved varieties, basic but consistent management, and patience through the first four years. Farmers who provide these ingredients find that cashew rewards them with reliable income for decades, requiring less annual effort than almost any other commercial crop.

Farmers seeking certified grafted cashew seedlings of improved varieties, including the new KALRO disease-tolerant variety, AC4, AC10, or AZA2, can contact Organic Farm for expert guidance and quality planting material. Visit our website www.organicfarm.co.ke, call or WhatsApp +254712075915, or send an email to oxfarmorganic@gmail.com.