Growing Courgette (Zucchini) in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Courgette (Zucchini) (soil-match score 27/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Courgette (Zucchini)'s preferred 5.8–7 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/high demand — so the fertilizer plan below prioritises closing that deficit. Courgette (Zucchini) 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 Courgette (Zucchini)'s minimum of 500 mm — so supplemental irrigation would be essential for this crop. Courgette (Zucchini)'s full potential is about 12,000 kg/acre (~KES 600,000/acre at KES 50/kg), but at Isiolo's 27/100 suitability a realistic target here is closer to 4,050 kg/acre (~KES 202,500/acre) unless the constraints above are addressed.