Growing Sesame (Simsim) in Vihiga
Soil suitability analysis based on Vihiga's nutrient profile
Generally not ideal — Vihiga is poorly suited to Sesame (Simsim). Vihiga's soil (pH 5.62, slightly acidic) gives Sesame (Simsim) a suitability score of 39/100. Match fertilizer to Vihiga's nitrogen and phosphorus levels for the best result.
Vihiga County is a challenging environment for Sesame (Simsim) (soil-match score 39/100) and will need significant amendment before planting. Local soils average pH 5.62 — slightly acidic to near-neutral and inside the 5.5–7 band Sesame (Simsim) prefers, so no lime is usually required. Nitrogen (1.02 g/kg), phosphorus (14.8 mg/kg) and potassium (164 mg/kg) all meet Sesame (Simsim)'s requirements, so a maintenance fertilizer programme is enough. Sesame (Simsim) prefers sandy soils, while Vihiga is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Sesame (Simsim) is the #84 soil match of the 106 crops we assess for Vihiga County. Sesame (Simsim)'s full potential is about 250 kg/acre (~KES 87,500/acre at KES 350/kg), but at Vihiga's 39/100 suitability a realistic target here is closer to 122 kg/acre (~KES 42,700/acre) unless the constraints above are addressed.
Better matched to Vihiga's soil: Sweet Potato, Soybeans, and Coffee (Arabica) — each scores higher on the same soil.
Soil & climate match
| Factor | Vihiga soil | Sesame (Simsim) needs | Status |
|---|---|---|---|
| pH | 5.62 | 5.5–7 | OK |
| Nitrogen | 1.02 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 14.8 mg/kg | min 6 mg/kg | OK |
| Potassium | 164 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,800 mm | 300–800 mm | High |
| Altitude | 1,700 m | 0–1,600 m | High |
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag