Growing Quinoa in Tana River

Soil suitability analysis based on Tana River's nutrient profile

Tana River County is a challenging environment for Quinoa (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 6–8.5 band Quinoa 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. Quinoa prefers loam soils, while Tana River is largely sandy, so drainage and organic-matter management matter more here. At 200 m, the county sits below Quinoa's preferred altitude range (1500–3000 m), which limits yield potential due to heat stress. On ShambaIQ's soil-match model, Quinoa is the #94 soil match of the 106 crops we assess for Tana River County. Quinoa's full potential is about 700 kg/acre (~KES 105,000/acre at KES 150/kg), but at Tana River's 1/100 suitability a realistic target here is closer to 9 kg/acre (~KES 1,350/acre) unless the constraints above are addressed.

Better matched to Tana River's soil: Sorghum, Cowpeas, and Pigeon Peas — each scores higher on the same soil.