Growing Grapes in Vihiga

Soil suitability analysis based on Vihiga's nutrient profile

Vihiga County is a challenging environment for Grapes (soil-match score 42/100) and will need significant amendment before planting. At an average pH of 5.62 the soil is slightly acidic to near-neutral, below Grapes's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is phosphorus and potassium — measured at N 1.02 g/kg, P 14.8 mg/kg, K 164 mg/kg against this crop's medium/high/high demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly clay loam soils suit Grapes, which favours loam. Grapes's full potential is about 8,000 kg/acre (~KES 1,200,000/acre at KES 150/kg), but at Vihiga's 42/100 suitability a realistic target here is closer to 4,200 kg/acre (~KES 630,000/acre) unless the constraints above are addressed.