Growing Napier Grass in Taita Taveta

Soil suitability analysis based on Taita Taveta's nutrient profile

Taita Taveta County is a challenging environment for Napier Grass (soil-match score 35/100) and will need significant amendment before planting. Local soils average pH 6.64 — neutral and inside the 5–8 band Napier Grass prefers, so no lime is usually required. The main gap is potassium — measured at N 0.97 g/kg, P 12.9 mg/kg, K 104 mg/kg against this crop's medium/low/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly loam soils suit Napier Grass, which favours loam. Taita Taveta 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 Taita Taveta's 35/100 suitability a realistic target here is closer to 13,125 kg/acre (~KES 65,625/acre) unless the constraints above are addressed.