Growing Chia in Kirinyaga

Soil suitability analysis based on Kirinyaga's nutrient profile

Kirinyaga County is a challenging environment for Chia (soil-match score 44/100) and will need significant amendment before planting. At an average pH of 5.31 the soil is moderately acidic, below Chia's preferred 6–8 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.36 g/kg), phosphorus (12.5 mg/kg) and potassium (177 mg/kg) all meet Chia's requirements, so a maintenance fertilizer programme is enough. Chia prefers sandy loam soils, while Kirinyaga is largely clay, so drainage and organic-matter management matter more here. Chia's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Kirinyaga's 44/100 suitability a realistic target here is closer to 220 kg/acre (~KES 33,000/acre) unless the constraints above are addressed.