Growing Rosemary in Kakamega

Soil suitability analysis based on Kakamega's nutrient profile

Kakamega County is a challenging environment for Rosemary (soil-match score 35/100) and will need significant amendment before planting. At an average pH of 5.63 the soil is slightly acidic to near-neutral, below Rosemary's preferred 6–8 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is potassium — measured at N 1.01 g/kg, P 14 mg/kg, K 147 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Rosemary prefers sandy loam soils, while Kakamega is largely clay loam, so drainage and organic-matter management matter more here. Rosemary's full potential is about 2,500 kg/acre (~KES 375,000/acre at KES 150/kg), but at Kakamega's 35/100 suitability a realistic target here is closer to 1,094 kg/acre (~KES 164,100/acre) unless the constraints above are addressed.