Growing Quinoa in Kitui

Soil suitability analysis based on Kitui's nutrient profile

Kitui County is a challenging environment for Quinoa (soil-match score 32/100) and will need significant amendment before planting. Local soils average pH 7.03 — neutral and inside the 6–8.5 band Quinoa prefers, so no lime is usually required. 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 Quinoa, which favours loam. At 900 m, the county sits below Quinoa's preferred altitude range (1500–3000 m), which limits yield potential due to heat stress. Quinoa's full potential is about 700 kg/acre (~KES 105,000/acre at KES 150/kg), but at Kitui's 32/100 suitability a realistic target here is closer to 280 kg/acre (~KES 42,000/acre) unless the constraints above are addressed.