Growing Okra in Kiambu

Soil suitability analysis based on Kiambu's nutrient profile

Kiambu County is a challenging environment for Okra (soil-match score 40/100) and will need significant amendment before planting. At an average pH of 5.28 the soil is moderately acidic, below Okra'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 Okra's requirements, so a maintenance fertilizer programme is enough. Okra prefers loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. At 1700 m, the county sits above Okra's preferred altitude ceiling of 1300 m, where frost risk and cold nights reduce the crop's productivity. Okra's full potential is about 5,000 kg/acre (~KES 300,000/acre at KES 60/kg), but at Kiambu's 40/100 suitability a realistic target here is closer to 2,500 kg/acre (~KES 150,000/acre) unless the constraints above are addressed.