Growing Stevia in Taita Taveta
Soil suitability analysis based on Taita Taveta's nutrient profile
Possible but challenging — Taita Taveta is only marginally suited to Stevia. Taita Taveta's soil (pH 6.64, near-neutral) gives Stevia a suitability score of 44/100. Match fertilizer to Taita Taveta's nitrogen and phosphorus levels for the best result.
Taita Taveta County is a challenging environment for Stevia (soil-match score 44/100) and will need significant amendment before planting. Local soils average pH 6.64 — neutral and inside the 6–7.5 band Stevia prefers, so no lime is usually required. The main gap is nitrogen and potassium — measured at N 0.97 g/kg, P 12.9 mg/kg, K 104 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly loam soils suit Stevia, which favours loam. Taita Taveta receives approximately 500 mm/year — well below Stevia's minimum of 700 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Stevia is the #61 soil match of the 106 crops we assess for Taita Taveta County. Stevia's full potential is about 3,000 kg/acre (~KES 600,000/acre at KES 200/kg), but at Taita Taveta's 44/100 suitability a realistic target here is closer to 1,650 kg/acre (~KES 330,000/acre) unless the constraints above are addressed.
Better matched to Taita Taveta's soil: Sorghum, Cowpeas, and Pigeon Peas — each scores higher on the same soil.
Soil & climate match
| Factor | Taita Taveta soil | Stevia needs | Status |
|---|---|---|---|
| pH | 6.64 | 6–7.5 | OK |
| Nitrogen | 0.97 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 12.9 mg/kg | min 12 mg/kg | OK |
| Potassium | 104 mg/kg | min 150 mg/kg | Low |
| Rainfall | 500 mm | 700–1,500 mm | Low |
| Altitude | 700 m | 500–2,000 m | OK |
Planting calendar for Taita Taveta
Long Rains· April–JuneMain season here
Short Rains· November–January
Top dressing guide
Taita Taveta's nitrogen (0.97 g/kg) is 81% of the 1.2 g/kg Stevia needs, so the standard 0.3 bags/acre is raised to 0.5. Split it across two applications to limit leaching.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag