Growing Macadamia in Tana River

Soil suitability analysis based on Tana River's nutrient profile

Tana River County is a challenging environment for Macadamia (soil-match score 1/100) and will need significant amendment before planting. Local soils average pH 6.4 — slightly acidic to near-neutral and inside the 4.5–6.5 band Macadamia prefers, so no lime is usually required. The main gap is phosphorus and potassium — measured at N 1.04 g/kg, P 8.5 mg/kg, K 108 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing those deficits. Macadamia prefers loam soils, while Tana River is largely sandy, so drainage and organic-matter management matter more here. Tana River receives approximately 400 mm/year — well below Macadamia's minimum of 700 mm — so supplemental irrigation would be essential for this crop. Macadamia's full potential is about 1,800 kg/acre (~KES 198,000/acre at KES 110/kg), but at Tana River's 1/100 suitability a realistic target here is closer to 23 kg/acre (~KES 2,530/acre) unless the constraints above are addressed.