Growing Macadamia in Kitui

Soil suitability analysis based on Kitui's nutrient profile

Kitui County is a challenging environment for Macadamia (soil-match score 32/100) and will need significant amendment before planting. At an average pH of 7.03 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 0.74 g/kg, P 30.5 mg/kg, K 339 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit Macadamia, which favours loam. Kitui receives approximately 500 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 Kitui's 32/100 suitability a realistic target here is closer to 720 kg/acre (~KES 79,200/acre) unless the constraints above are addressed.