Growing Cowpeas in Nyeri
Soil suitability analysis based on Nyeri's nutrient profile
Possible but challenging — Nyeri is only marginally suited to Cowpeas. Nyeri's soil (pH 5.23, strongly acidic) gives Cowpeas a suitability score of 47/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Cowpeas can be grown in Nyeri County, but the soil scores 47/100 and needs targeted management to reach full potential. Local soils average pH 5.23 — moderately acidic and inside the 5–8 band Cowpeas prefers, so no lime is usually required. Nitrogen (1.09 g/kg), phosphorus (15.5 mg/kg) and potassium (192 mg/kg) all meet Cowpeas's requirements, so a maintenance fertilizer programme is enough. Cowpeas prefers sandy soils, while Nyeri is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Cowpeas is the #88 soil match of the 106 crops we assess for Nyeri County. Cowpeas's full potential is about 450 kg/acre (~KES 29,250/acre at KES 65/kg), but at Nyeri's 47/100 suitability a realistic target here is closer to 264 kg/acre (~KES 17,160/acre) unless the constraints above are addressed.
Better matched to Nyeri's soil: Macadamia, Pineapple, and Avocado — each scores higher on the same soil.
Soil & climate match
| Factor | Nyeri soil | Cowpeas needs | Status |
|---|---|---|---|
| pH | 5.23 | 5–8 | OK |
| Nitrogen | 1.09 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 15.5 mg/kg | min 6 mg/kg | OK |
| Potassium | 192 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,200 mm | 250–700 mm | High |
| Altitude | 1,700 m | 0–1,800 m | OK |
Top dressing guide
Nyeri's nitrogen reads 1.09 g/kg, but the rate stays at zero: Cowpeas is not top-dressed, for the crop-specific reason above.
Seed varieties for Nyeri
Varieties suited to Nyeri's 1,700 m altitude and 1,200 mm annual rainfall — 1 of 2 cowpeas varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag