Growing Pawpaw in Laikipia

Soil suitability analysis based on Laikipia's nutrient profile

Laikipia County is a challenging environment for Pawpaw (soil-match score 31/100) and will need significant amendment before planting. At an average pH of 4.99 the soil is strongly acidic, below Pawpaw's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.42 g/kg), phosphorus (16.6 mg/kg) and potassium (215 mg/kg) all meet Pawpaw's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Pawpaw, which favours sandy loam. At 1700 m, the county sits above Pawpaw's preferred altitude ceiling of 1200 m, where frost risk and cold nights reduce the crop's productivity. Pawpaw's full potential is about 12,000 kg/acre (~KES 336,000/acre at KES 28/kg), but at Laikipia's 31/100 suitability a realistic target here is closer to 4,650 kg/acre (~KES 130,200/acre) unless the constraints above are addressed.