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. Garlic's full potential is about 3,000 kg/acre (~KES 825,000/acre at KES 275/kg), but at Isiolo's 31/100 suitability a realistic target here is closer to 1,163 kg/acre (~KES 319,825/acre) unless the constraints above are addressed.