Growing Napier Grass in Kajiado

Soil suitability analysis based on Kajiado's nutrient profile

Kajiado County is a challenging environment for Napier Grass (soil-match score 36/100) and will need significant amendment before planting. Local soils average pH 6.55 — neutral and inside the 5–8 band Napier Grass prefers, so no lime is usually required. Nitrogen (0.97 g/kg), phosphorus (20.6 mg/kg) and potassium (257 mg/kg) all meet Napier Grass's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Napier Grass, which favours loam. Kajiado receives approximately 500 mm/year — well below Napier Grass's minimum of 800 mm — so supplemental irrigation would be essential for this crop. Napier Grass's full potential is about 30,000 kg/acre (~KES 150,000/acre at KES 5/kg), but at Kajiado's 36/100 suitability a realistic target here is closer to 13,500 kg/acre (~KES 67,500/acre) unless the constraints above are addressed.