Growing Watermelon in Siaya

Soil suitability analysis based on Siaya's nutrient profile

Siaya County is a challenging environment for Watermelon (soil-match score 43/100) and will need significant amendment before planting. At an average pH of 5.33 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. The main gap is potassium — measured at N 1.2 g/kg, P 12.1 mg/kg, K 134 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Watermelon prefers sandy soils, while Siaya is largely clay loam, 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 Siaya's 43/100 suitability a realistic target here is closer to 8,063 kg/acre (~KES 80,630/acre) unless the constraints above are addressed.