Growing Rosemary in Marsabit

Soil suitability analysis based on Marsabit's nutrient profile

Marsabit County is a challenging environment for Rosemary (soil-match score 36/100) and will need significant amendment before planting. At an average pH of 8.22 the soil sits above Rosemary's preferred 6–8 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.52 g/kg, P 37.3 mg/kg, K 420 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 Rosemary, which favours sandy loam. Rosemary's full potential is about 2,500 kg/acre (~KES 375,000/acre at KES 150/kg), but at Marsabit's 36/100 suitability a realistic target here is closer to 1,125 kg/acre (~KES 168,750/acre) unless the constraints above are addressed.