Growing Chia in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Chia (soil-match score 2/100) and will need significant amendment before planting. Local soils average pH 7.96 — alkaline and inside the 6–8 band Chia prefers, so no lime is usually required. Nitrogen (0.61 g/kg), phosphorus (37.7 mg/kg) and potassium (407 mg/kg) all meet Chia's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy soils suit Chia, which favours sandy loam. At 200 m, the county sits below Chia's preferred altitude range (1000–2200 m), which limits yield potential due to heat stress. Chia's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Garissa's 2/100 suitability a realistic target here is closer to 10 kg/acre (~KES 1,500/acre) unless the constraints above are addressed.