Growing Arrow Root in Nyandarua

Soil suitability analysis based on Nyandarua's nutrient profile

Nyandarua County is a solid choice for Arrow Root, with a soil-match score of 62/100. Local soils average pH 5.38 — moderately acidic and inside the 5–7 band Arrow Root prefers, so no lime is usually required. 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. The county's predominantly clay soils suit Arrow Root, which favours clay loam. At 2300 m, the county sits above Arrow Root's preferred altitude ceiling of 1800 m, where frost risk and cold nights reduce the crop's productivity. At current prices (about KES 55/kg) and a typical 4,500 kg/acre yield, a well-managed Arrow Root crop here can gross roughly KES 247,500 per acre.