Growing Macadamia in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Macadamia (soil-match score 0/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Macadamia's preferred 4.5–6.5 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 medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Macadamia prefers loam soils, while Garissa is largely sandy, so drainage and organic-matter management matter more here. Garissa receives approximately 250 mm/year — well below Macadamia's minimum of 700 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 110/kg) and a typical 1,500 kg/acre yield, a well-managed Macadamia crop here can gross roughly KES 165,000 per acre.