Growing Onion in Migori

Soil suitability analysis based on Migori's nutrient profile

Onion can be grown in Migori County, but the soil scores 55/100 and needs targeted management to reach full potential. At an average pH of 5.43 the soil is moderately acidic, below Onion's preferred 6–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is phosphorus — measured at N 1.2 g/kg, P 12.2 mg/kg, K 169 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing that deficit. Onion prefers sandy loam soils, while Migori is largely clay loam, so drainage and organic-matter management matter more here. Onion's full potential is about 6,000 kg/acre (~KES 420,000/acre at KES 70/kg), but at Migori's 55/100 suitability a realistic target here is closer to 4,125 kg/acre (~KES 288,750/acre) unless the constraints above are addressed.