Growing Napier Grass in Lamu

Soil suitability analysis based on Lamu's nutrient profile

Napier Grass can be grown in Lamu County, but the soil scores 50/100 and needs targeted management to reach full potential. Local soils average pH 6.31 — slightly acidic to near-neutral and inside the 5–8 band Napier Grass prefers, so no lime is usually required. The main gap is nitrogen and potassium — measured at N 0.74 g/kg, P 9.6 mg/kg, K 117 mg/kg against this crop's medium/low/medium demand — so the fertilizer plan below prioritises closing those deficits. Napier Grass prefers loam soils, while Lamu is largely sandy, so drainage and organic-matter management matter more here. Napier Grass's full potential is about 30,000 kg/acre (~KES 150,000/acre at KES 5/kg), but at Lamu's 50/100 suitability a realistic target here is closer to 18,750 kg/acre (~KES 93,750/acre) unless the constraints above are addressed.