Growing Cashew Nuts in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Cashew Nuts (soil-match score 11/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Cashew Nuts's preferred 5–7.5 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.61 g/kg), phosphorus (37.7 mg/kg) and potassium (407 mg/kg) all meet Cashew Nuts's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy soils suit Cashew Nuts, which favours sandy. Garissa receives approximately 250 mm/year — well below Cashew Nuts's minimum of 600 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 275/kg) and a typical 900 kg/acre yield, a well-managed Cashew Nuts crop here can gross roughly KES 247,500 per acre.