Growing Watermelon in Nandi

Soil suitability analysis based on Nandi's nutrient profile

Nandi County is a challenging environment for Watermelon (soil-match score 27/100) and will need significant amendment before planting. Local soils average pH 6.17 — slightly acidic to near-neutral and inside the 6–7.5 band Watermelon prefers, so no lime is usually required. Nitrogen (1.37 g/kg), phosphorus (26.4 mg/kg) and potassium (207 mg/kg) all meet Watermelon's requirements, so a maintenance fertilizer programme is enough. Watermelon prefers sandy soils, while Nandi is largely clay loam, so drainage and organic-matter management matter more here. At 1900 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 Nandi's 27/100 suitability a realistic target here is closer to 5,063 kg/acre (~KES 50,630/acre) unless the constraints above are addressed.