Growing African Nightshade in Kitui
Soil suitability analysis based on Kitui's nutrient profile
Generally not ideal — Kitui is poorly suited to African Nightshade. Kitui's soil (pH 7.03, near-neutral) gives African Nightshade a suitability score of 25/100. Match fertilizer to Kitui's nitrogen and phosphorus levels for the best result.
Kitui County is a challenging environment for African Nightshade (soil-match score 25/100) and will need significant amendment before planting. Local soils average pH 7.03 — neutral and inside the 5.5–7.5 band African Nightshade prefers, so no lime is usually required. The main gap is nitrogen — measured at N 0.74 g/kg, P 30.5 mg/kg, K 339 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit African Nightshade, which favours loam. Kitui receives approximately 500 mm/year — well below African Nightshade's minimum of 800 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, African Nightshade is the #77 soil match of the 106 crops we assess for Kitui County. African Nightshade's full potential is about 5,000 kg/acre (~KES 250,000/acre at KES 50/kg), but at Kitui's 25/100 suitability a realistic target here is closer to 1,563 kg/acre (~KES 78,150/acre) unless the constraints above are addressed.
Better matched to Kitui's soil: Mango, Sisal, and Moringa — each scores higher on the same soil.
Soil & climate match
| Factor | Kitui soil | African Nightshade needs | Status |
|---|---|---|---|
| pH | 7.03 | 5.5–7.5 | OK |
| Nitrogen | 0.74 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 30.5 mg/kg | min 12 mg/kg | OK |
| Potassium | 339 mg/kg | min 150 mg/kg | OK |
| Rainfall | 500 mm | 800–1,500 mm | Low |
| Altitude | 900 m | 1,000–2,200 m | Low |
Planting calendar
Long Rains
Short Rains
Dry Season
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag