Growing Watermelon in Uasin Gishu

Soil suitability analysis based on Uasin Gishu's nutrient profile

Uasin Gishu County is a challenging environment for Watermelon (soil-match score 33/100) and will need significant amendment before planting. Local soils average pH 6.39 — slightly acidic to near-neutral and inside the 6–7.5 band Watermelon prefers, so no lime is usually required. Nitrogen (1.56 g/kg), phosphorus (25.3 mg/kg) and potassium (227 mg/kg) all meet Watermelon's requirements, so a maintenance fertilizer programme is enough. Watermelon prefers sandy soils, while Uasin Gishu is largely clay loam, so drainage and organic-matter management matter more here. At 2100 m, the county sits above Watermelon's preferred altitude ceiling of 1500 m, where frost risk and cold nights reduce the crop's productivity. Watermelon's full potential is about 15,000 kg/acre (~KES 150,000/acre at KES 10/kg), but at Uasin Gishu's 33/100 suitability a realistic target here is closer to 6,188 kg/acre (~KES 61,880/acre) unless the constraints above are addressed.