Growing Capsicum in Kiambu

Soil suitability analysis based on Kiambu's nutrient profile

Kiambu County is a solid choice for Capsicum, with a soil-match score of 70/100. At an average pH of 5.28 the soil is moderately acidic, below Capsicum's preferred 5.5–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is nitrogen, phosphorus, and potassium — measured at N 1.01 g/kg, P 13.7 mg/kg, K 169 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing those deficits. Capsicum prefers loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. Capsicum's full potential is about 6,000 kg/acre (~KES 540,000/acre at KES 90/kg), but at Kiambu's 70/100 suitability a realistic target here is closer to 5,250 kg/acre (~KES 472,500/acre) unless the constraints above are addressed.