Growing Onion in Nyeri

Soil suitability analysis based on Nyeri's nutrient profile

Nyeri County is a solid choice for Onion, with a soil-match score of 60/100. At an average pH of 5.23 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 nitrogen and phosphorus — measured at N 1.09 g/kg, P 15.5 mg/kg, K 192 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing those deficits. Onion prefers sandy loam soils, while Nyeri is largely clay, 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 Nyeri's 60/100 suitability a realistic target here is closer to 4,500 kg/acre (~KES 315,000/acre) unless the constraints above are addressed.