Growing Potato in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Potato (soil-match score 0/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Potato's preferred 4.8–6.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.61 g/kg, P 37.7 mg/kg, K 407 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Potato, which favours sandy loam. Garissa receives approximately 250 mm/year — well below Potato's minimum of 700 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 32/kg) and a typical 4,000 kg/acre yield, a well-managed Potato crop here can gross roughly KES 128,000 per acre.