Growing Spinach in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Spinach (soil-match score 21/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Spinach's preferred 6–7.5 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 high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Spinach prefers loam soils, while Isiolo is largely sandy, so drainage and organic-matter management matter more here. Isiolo receives approximately 350 mm/year — well below Spinach's minimum of 600 mm — so supplemental irrigation would be essential for this crop. Spinach's full potential is about 8,000 kg/acre (~KES 200,000/acre at KES 25/kg), but at Isiolo's 21/100 suitability a realistic target here is closer to 2,100 kg/acre (~KES 52,500/acre) unless the constraints above are addressed.