Growing Coffee (Arabica) in Lamu

Soil suitability analysis based on Lamu's nutrient profile

Lamu County is a challenging environment for Coffee (Arabica) (soil-match score 0/100) and will need significant amendment before planting. At an average pH of 6.31 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 0.74 g/kg, P 9.6 mg/kg, K 117 mg/kg against this crop's high/medium/high demand — so the fertilizer plan below prioritises closing those deficits. Coffee (Arabica) prefers loam soils, while Lamu is largely sandy, so drainage and organic-matter management matter more here. Lamu receives approximately 600 mm/year — well below Coffee (Arabica)'s minimum of 1000 mm — so supplemental irrigation would be essential for this crop. Coffee (Arabica)'s full potential is about 800 kg/acre (~KES 96,000/acre at KES 120/kg), but at Lamu's 0/100 suitability a realistic target here is closer to 0 kg/acre (~KES 0/acre) unless the constraints above are addressed.