Growing Garlic in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Garlic (soil-match score 31/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Garlic'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/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Garlic, which favours sandy loam. Isiolo receives approximately 350 mm/year — well below Garlic's minimum of 500 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 275/kg) and a typical 1,800 kg/acre yield, a well-managed Garlic crop here can gross roughly KES 495,000 per acre.