Growing Pyrethrum in Mandera

Soil suitability analysis based on Mandera's nutrient profile

Mandera County is a challenging environment for Pyrethrum (soil-match score 0/100) and will need significant amendment before planting. At an average pH of 8.38 the soil sits above Pyrethrum's preferred 5–6.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.53 g/kg, P 38.3 mg/kg, K 420 mg/kg against this crop's medium/high/medium demand — so the fertilizer plan below prioritises closing that deficit. Pyrethrum prefers loam soils, while Mandera is largely sandy, so drainage and organic-matter management matter more here. Mandera receives approximately 180 mm/year — well below Pyrethrum's minimum of 900 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 280/kg) and a typical 400 kg/acre yield, a well-managed Pyrethrum crop here can gross roughly KES 112,000 per acre.