Growing Cowpeas in Siaya
Soil suitability analysis based on Siaya's nutrient profile
Possible but challenging — Siaya is only marginally suited to Cowpeas. Siaya's soil (pH 5.33, strongly acidic) gives Cowpeas a suitability score of 48/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Cowpeas can be grown in Siaya County, but the soil scores 48/100 and needs targeted management to reach full potential. Local soils average pH 5.33 — moderately acidic and inside the 5–8 band Cowpeas prefers, so no lime is usually required. Nitrogen (1.2 g/kg), phosphorus (12.1 mg/kg) and potassium (134 mg/kg) all meet Cowpeas's requirements, so a maintenance fertilizer programme is enough. Cowpeas prefers sandy soils, while Siaya is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Cowpeas is the #86 soil match of the 106 crops we assess for Siaya County. Cowpeas's full potential is about 450 kg/acre (~KES 29,250/acre at KES 65/kg), but at Siaya's 48/100 suitability a realistic target here is closer to 270 kg/acre (~KES 17,550/acre) unless the constraints above are addressed.
Better matched to Siaya's soil: Macadamia, Pineapple, and Avocado — each scores higher on the same soil.
Soil & climate match
| Factor | Siaya soil | Cowpeas needs | Status |
|---|---|---|---|
| pH | 5.33 | 5–8 | OK |
| Nitrogen | 1.2 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 12.1 mg/kg | min 6 mg/kg | OK |
| Potassium | 134 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,200 mm | 250–700 mm | High |
| Altitude | 1,200 m | 0–1,800 m | OK |
Top dressing guide
Siaya's nitrogen reads 1.2 g/kg, but the rate stays at zero: Cowpeas is not top-dressed, for the crop-specific reason above.
Seed varieties for Siaya
Varieties suited to Siaya's 1,200 m altitude and 1,200 mm annual rainfall — 1 of 2 cowpeas varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag