Growing Ginger in Nyandarua

Soil suitability analysis based on Nyandarua's nutrient profile

Nyandarua County is a challenging environment for Ginger (soil-match score 18/100) and will need significant amendment before planting. At an average pH of 5.38 the soil is moderately acidic, below Ginger's preferred 5.5–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is potassium — measured at N 1.28 g/kg, P 14 mg/kg, K 166 mg/kg against this crop's medium/medium/high demand — so the fertilizer plan below prioritises closing that deficit. Ginger prefers sandy loam soils, while Nyandarua is largely clay, so drainage and organic-matter management matter more here. Nyandarua receives approximately 1100 mm/year — well below Ginger's minimum of 1500 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 200/kg) and a typical 6,000 kg/acre yield, a well-managed Ginger crop here can gross roughly KES 1,200,000 per acre.