Growing Pumpkin in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Pumpkin (soil-match score 32/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Pumpkin's preferred 5.8–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.46 g/kg, P 37.4 mg/kg, K 395 mg/kg against this crop's medium/medium/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Pumpkin, which favours sandy loam. Isiolo receives approximately 350 mm/year — well below Pumpkin's minimum of 500 mm — so supplemental irrigation would be essential for this crop. Pumpkin's full potential is about 10,000 kg/acre (~KES 300,000/acre at KES 30/kg), but at Isiolo's 32/100 suitability a realistic target here is closer to 4,000 kg/acre (~KES 120,000/acre) unless the constraints above are addressed.