Cashew Nuts farming guide — Kenya

Soil requirements

Growing conditions for Cashew Nuts

Cashew Nuts does best with 600–1,500 mm of rainfall a year at 0–500 m above sea level. In drier areas, irrigation or water harvesting closes the gap; outside the altitude band, growth and yields drop.

Optimizing soil and fertilizers for Cashew Nuts in Kenya

To achieve maximum yields when farming cashew nuts in Kenya, managing soil suitability is crucial. This crop performs best within a soil pH range of 5 to 7.5. Soils that fall outside this range can lock out essential macro and micro-nutrients, leading to stunted growth or crop failure. For acidic soils, applying dolomitic or calcitic agricultural lime is recommended at least 30 days before planting to normalize acidity.

Fertilizer application should be calibrated based on the crop’s nutrient demands. Cashew Nuts has a low nitrogen requirement, low phosphorus requirement, and medium potassium demand. Using certified seed varieties suited for your specific altitude and rainfall pattern, combined with a precise basal and top-dressing program (such as applying CAN at Start of rains biannual), ensures high crop quality and protects your overall farm investment.

How to grow cashew nuts in Kenya

1. 1
   Prepare the soil

   Ensure soil pH is between 5 and 7.5. Preferred texture: Sandy. Apply agricultural lime if your pH is below 5, ideally 30 days before planting.
2. 2
   Plant at the right time

   Plant cashew nuts during Long Rains (Weed Control & Formative Pruning–Fertilizer Application) or Short Rains (Flower Induction Monitoring–Early Nut Set) or Dry Season (Flowering & Nut Set–Drying & Sanitation Pruning), timed to the start of the rains.
3. 3
   Apply basal fertilizer

   Cashew Nuts needs low nitrogen, low phosphorus, and medium potassium. Apply a balanced basal fertilizer such as DAP or NPK at planting.
4. 4
   Top-dress

   At Start of rains biannual, apply 0.3 bag(s) per acre of CAN. Apply in a ring around the drip line. Young trees need less — scale up as canopy develops.
5. 5
   Monitor and harvest

   Scout regularly for pests and disease. Expected yield is about 900 kg/acre at roughly KES 275/kg.

Best counties for Cashew Nuts

Challenging counties for Cashew Nuts

These counties may need soil amendments for Cashew Nuts

Certified seed varieties

Planting calendar

Establishment timeline

Cashew Nuts is a perennial — it takes ~4 years to first harvest before your first crop, then yields for many years. Here is what each stage involves.

1. Year 0 — Planting · Onset of rains

   Plant grafted seedlings 10 × 10 m in coastal sandy soils; water to establish.

2. Years 1–2 — Vegetative

   Formative prune, weed, protect from bush fire. No nuts yet.

3. Year 3 — Early bearing · Dry-season flowering

   First flowering and light nut set; control powdery mildew and helopeltis.

4. Year 4 — First harvest

   First commercial apple and nut crop; pick fallen nuts and dry.