Growing Coffee (Arabica) in Kwale

Soil suitability analysis based on Kwale's nutrient profile

Kwale County is a challenging environment for Coffee (Arabica) (soil-match score 1/100) and will need significant amendment before planting. At an average pH of 6.76 the soil sits above Coffee (Arabica)'s preferred 5–6 range, which can limit uptake of phosphorus and micronutrients. 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/high demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly sandy loam soils suit Coffee (Arabica), which favours loam. At 200 m, the county sits below Coffee (Arabica)'s preferred altitude range (1300–2200 m), which limits yield potential due to heat stress. Coffee (Arabica)'s full potential is about 800 kg/acre (~KES 96,000/acre at KES 120/kg), but at Kwale's 1/100 suitability a realistic target here is closer to 10 kg/acre (~KES 1,200/acre) unless the constraints above are addressed.