Growing Napier Grass in Nyandarua
Soil suitability analysis based on Nyandarua's nutrient profile
Yes — Nyandarua is well suited to Napier Grass. Nyandarua's soil (pH 5.38, strongly acidic) gives Napier Grass a suitability score of 76/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Nyandarua County is well suited to Napier Grass, scoring 76/100 on ShambaIQ's soil-match model. Local soils average pH 5.38 — moderately acidic and inside the 5–8 band Napier Grass prefers, so no lime is usually required. Nitrogen (1.28 g/kg), phosphorus (14 mg/kg) and potassium (166 mg/kg) all meet Napier Grass's requirements, so a maintenance fertilizer programme is enough. Napier Grass prefers loam soils, while Nyandarua is largely clay, so drainage and organic-matter management matter more here. 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 | Nyandarua soil | Napier Grass needs | Status |
|---|---|---|---|
| pH | 5.38 | 5–8 | OK |
| Nitrogen | 1.28 g/kg | min 0.8 g/kg | OK |
| Phosphorus | 14 mg/kg | min 6 mg/kg | OK |
| Potassium | 166 mg/kg | min 150 mg/kg | OK |
| Rainfall | 1,100 mm | 800–2,000 mm | OK |
| Altitude | 2,300 m | 0–2,500 m | OK |
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag