Dolichos farming guide — Kenya
Soil requirements, top counties, seed varieties, fertilizer plan & economics
To grow dolichos in Kenya, aim for soil pH 5–7.5 (sandy loam soils); the best-suited counties are Nakuru, Narok, Elgeyo Marakwet, West Pokot, Kajiado. Apply DAP or NPK at planting and top-dress with None at None required. A well-managed crop yields about 600 kg/acre (~KES 72,000 gross per acre).
Interested in starting or scaling dolichos farming in Kenya? This comprehensive guide maps out the optimal soil requirements (such as target pH ranges), the most suitable counties for growing dolichos, certified seed varieties, seasonal fertilizer guidelines, and a detailed per-acre production budget to set you up for a successful harvest.
Soil requirements
Growing conditions for Dolichos
Dolichos does best with 400–1,000 mm of rainfall a year at 1,000–2,100 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 Dolichos in Kenya
To achieve maximum yields when farming dolichos 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. Dolichos has a low nitrogen requirement, low phosphorus requirement, and low 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 None at None required), ensures high crop quality and protects your overall farm investment.
How to grow dolichos in Kenya
- 1Prepare the soilEnsure soil pH is between 5 and 7.5. Preferred texture: Sandy Loam. Apply agricultural lime if your pH is below 5, ideally 30 days before planting.
- 2Plant at the right timePlant dolichos during Long Rains (Sowing & DAP Basal Fertilizer (NO CAN — nitrogen fixer)–Pod Fill & Harvesting) or Short Rains (Sowing & Basal Fertilizer (no CAN)–Harvesting & Seed Drying) or Dry Season (Post-Harvest seed storage–Seed Selection & preparation), timed to the start of the rains.
- 3Apply basal fertilizerDolichos needs low nitrogen, low phosphorus, and low potassium. Apply a balanced basal fertilizer such as DAP or NPK at planting.
- 4Top-dressAt None required, apply 0 bag(s) per acre of None. Dolichos (njahi) fixes its own nitrogen through rhizobia. Do NOT apply CAN — it suppresses nodulation and reduces yield. A starter dose of phosphorus at planting is enough.
- 5Monitor and harvestScout regularly for pests and disease. Expected yield is about 600 kg/acre at roughly KES 120/kg.
Best counties for Dolichos
Challenging counties for Dolichos
These counties may need soil amendments for Dolichos
Certified seed varieties
Planting calendar
Long Rains
Short Rains
Dry Season
Economics
Top dressing
Dolichos (njahi) fixes its own nitrogen through rhizobia. Do NOT apply CAN — it suppresses nodulation and reduces yield. A starter dose of phosphorus at planting is enough.
Fertilizer prices
Subsidized price / 50kg bag
Frequently asked questions about dolichos farming in Kenya
What soil pH is best for growing dolichos in Kenya?
Dolichos grows best in soil with a pH of 5 to 7.5. If your soil is more acidic than pH 5, apply agricultural lime about 30 days before planting to raise the pH and free up nutrients. The preferred soil texture is sandy loam.
Which counties are best for dolichos farming in Kenya?
By soil suitability, the top counties for dolichos are Nakuru, Narok, Elgeyo Marakwet, West Pokot, Kajiado. A full ranking of all 47 counties, each with a suitability score, is shown above.
What fertilizer does dolichos need?
Dolichos has low nitrogen, low phosphorus, and low potassium requirements. Apply a balanced basal fertilizer such as DAP or NPK at planting, then top-dress with 0 bag(s) per acre of None at None required.
When should I plant dolichos in Kenya?
Plant dolichos during Long Rains (Sowing & DAP Basal Fertilizer (NO CAN — nitrogen fixer) to Pod Fill & Harvesting) or Short Rains (Sowing & Basal Fertilizer (no CAN) to Harvesting & Seed Drying) or Dry Season (Post-Harvest seed storage to Seed Selection & preparation), timed to the start of the rains in your area.
How much can I earn from dolichos per acre in Kenya?
Dolichos yields about 600 kg per acre. At a market price of roughly KES 120/kg, that is around KES 72,000 per acre in gross revenue, before input and labour costs.
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