Growing Napier Grass in Siaya
Soil suitability analysis based on Siaya's nutrient profile
Yes, with the right inputs — Siaya is moderately suited to Napier Grass. Siaya's soil (pH 5.33, strongly acidic) gives Napier Grass a suitability score of 74/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Siaya County is a solid choice for Napier Grass, with a soil-match score of 74/100. Local soils average pH 5.33 — moderately acidic and inside the 5–8 band Napier Grass prefers, so no lime is usually required. The main gap is potassium — measured at N 1.2 g/kg, P 12.1 mg/kg, K 134 mg/kg against this crop's medium/low/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly clay loam soils suit Napier Grass, which favours loam. At current prices (about KES 5/kg) and a typical 30,000 kg/acre yield, a well-managed Napier Grass crop here can gross roughly KES 150,000 per acre.
Soil & climate match
| Factor | Siaya soil | Napier Grass needs | Status |
|---|---|---|---|
| pH | 5.33 | 5–8 | OK |
| Nitrogen | 1.2 g/kg | min 0.8 g/kg | OK |
| Phosphorus | 12.1 mg/kg | min 6 mg/kg | OK |
| Potassium | 134 mg/kg | min 150 mg/kg | Low |
| Rainfall | 1,200 mm | 800–2,000 mm | OK |
| Altitude | 1,200 m | 0–2,500 m | OK |
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag