Growing Sunflower in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Sunflower can be grown in Isiolo County, but the soil scores 51/100 and needs targeted management to reach full potential. At an average pH of 7.83 the soil sits above Sunflower'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 medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Sunflower, which favours sandy. Sunflower's full potential is about 750 kg/acre (~KES 36,000/acre at KES 48/kg), but at Isiolo's 51/100 suitability a realistic target here is closer to 478 kg/acre (~KES 22,944/acre) unless the constraints above are addressed.