Growing Pawpaw in Kirinyaga

Soil suitability analysis based on Kirinyaga's nutrient profile

Pawpaw can be grown in Kirinyaga County, but the soil scores 50/100 and needs targeted management to reach full potential. At an average pH of 5.31 the soil is moderately acidic, below Pawpaw's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is potassium — measured at N 1.36 g/kg, P 12.5 mg/kg, K 177 mg/kg against this crop's high/medium/high demand — so the fertilizer plan below prioritises closing that deficit. Pawpaw prefers sandy loam soils, while Kirinyaga is largely clay, so drainage and organic-matter management matter more here. At 1500 m, the county sits above Pawpaw's preferred altitude ceiling of 1200 m, where frost risk and cold nights reduce the crop's productivity. At current prices (about KES 28/kg) and a typical 10,000 kg/acre yield, a well-managed Pawpaw crop here can gross roughly KES 280,000 per acre.