Growing Pyrethrum in Kiambu

Soil suitability analysis based on Kiambu's nutrient profile

Kiambu County is well suited to Pyrethrum, scoring 75/100 on ShambaIQ's soil-match model. Local soils average pH 5.28 — moderately acidic and inside the 5–6.5 band Pyrethrum prefers, so no lime is usually required. The main gap is phosphorus — measured at N 1.01 g/kg, P 13.7 mg/kg, K 169 mg/kg against this crop's medium/high/medium demand — so the fertilizer plan below prioritises closing that deficit. Pyrethrum prefers loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. 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.