Growing Amaranth in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Amaranth (soil-match score 14/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Amaranth's preferred 5.5–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.61 g/kg, P 37.7 mg/kg, K 407 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Amaranth prefers loam soils, while Garissa is largely sandy, so drainage and organic-matter management matter more here. Garissa receives approximately 250 mm/year — well below Amaranth's minimum of 500 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 40/kg) and a typical 4,000 kg/acre yield, a well-managed Amaranth crop here can gross roughly KES 160,000 per acre.