Growing African Nightshade in Kwale

Soil suitability analysis based on Kwale's nutrient profile

Kwale County is a challenging environment for African Nightshade (soil-match score 3/100) and will need significant amendment before planting. Local soils average pH 6.76 — neutral and inside the 5.5–7.5 band African Nightshade 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/medium/medium demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly sandy loam soils suit African Nightshade, which favours loam. At 200 m, the county sits below African Nightshade's preferred altitude range (1000–2200 m), which limits yield potential due to heat stress. At current prices (about KES 50/kg) and a typical 3,500 kg/acre yield, a well-managed African Nightshade crop here can gross roughly KES 175,000 per acre.