Growing Chilies in Kiambu

Soil suitability analysis based on Kiambu's nutrient profile

Kiambu County is a challenging environment for Chilies (soil-match score 34/100) and will need significant amendment before planting. At an average pH of 5.28 the soil is moderately acidic, below Chilies's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.01 g/kg), phosphorus (13.7 mg/kg) and potassium (169 mg/kg) all meet Chilies's requirements, so a maintenance fertilizer programme is enough. Chilies prefers sandy loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. At 1700 m, the county sits above Chilies's preferred altitude ceiling of 1200 m, where frost risk and cold nights reduce the crop's productivity. Chilies's full potential is about 2,500 kg/acre (~KES 412,500/acre at KES 165/kg), but at Kiambu's 34/100 suitability a realistic target here is closer to 1,063 kg/acre (~KES 175,395/acre) unless the constraints above are addressed.