Growing Onion in Kwale

Soil suitability analysis based on Kwale's nutrient profile

Kwale County is well suited to Onion, scoring 78/100 on ShambaIQ's soil-match model. Local soils average pH 6.76 — neutral and inside the 6–7 band Onion prefers, so no lime is usually required. The main gap is nitrogen, phosphorus, and potassium — measured at N 0.93 g/kg, P 9.8 mg/kg, K 131 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly sandy loam soils suit Onion, which favours sandy loam. At current prices (about KES 45/kg) and a typical 3,500 kg/acre yield, a well-managed Onion crop here can gross roughly KES 157,500 per acre.