Growing Watermelon in Murang'a

Soil suitability analysis based on Murang'a's nutrient profile

Murang'a County is a challenging environment for Watermelon (soil-match score 41/100) and will need significant amendment before planting. At an average pH of 5.03 the soil is moderately acidic, below Watermelon's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.2 g/kg), phosphorus (12.2 mg/kg) and potassium (168 mg/kg) all meet Watermelon's requirements, so a maintenance fertilizer programme is enough. Watermelon prefers sandy soils, while Murang'a is largely clay, so drainage and organic-matter management matter more here. Watermelon's full potential is about 15,000 kg/acre (~KES 150,000/acre at KES 10/kg), but at Murang'a's 41/100 suitability a realistic target here is closer to 7,687 kg/acre (~KES 76,870/acre) unless the constraints above are addressed.