Growing Tree Tomato (Tamarillo) in Kitui
Soil suitability analysis based on Kitui's nutrient profile
Generally not ideal — Kitui is poorly suited to Tree Tomato (Tamarillo). Kitui's soil (pH 7.03, near-neutral) gives Tree Tomato (Tamarillo) a suitability score of 11/100. Match fertilizer to Kitui's nitrogen and phosphorus levels for the best result.
Kitui County is a challenging environment for Tree Tomato (Tamarillo) (soil-match score 11/100) and will need significant amendment before planting. At an average pH of 7.03 the soil sits above Tree Tomato (Tamarillo)'s preferred 5.8–7 range, which can limit uptake of phosphorus and micronutrients. 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/high/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit Tree Tomato (Tamarillo), which favours loam. Kitui receives approximately 500 mm/year — well below Tree Tomato (Tamarillo)'s minimum of 800 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Tree Tomato (Tamarillo) is the #98 soil match of the 106 crops we assess for Kitui County. Tree Tomato (Tamarillo)'s full potential is about 8,000 kg/acre (~KES 640,000/acre at KES 80/kg), but at Kitui's 11/100 suitability a realistic target here is closer to 1,100 kg/acre (~KES 88,000/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 | Tree Tomato (Tamarillo) needs | Status |
|---|---|---|---|
| pH | 7.03 | 5.8–7 | Adjust |
| Nitrogen | 0.74 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 30.5 mg/kg | min 20 mg/kg | OK |
| Potassium | 339 mg/kg | min 200 mg/kg | OK |
| Rainfall | 500 mm | 800–1,800 mm | Low |
| Altitude | 900 m | 1,500–2,800 m | Low |
Planting calendar for Kitui
Long Rains· March–May
Short Rains· October–DecemberMain season here
Top dressing guide
Kitui's nitrogen (0.74 g/kg) is 62% of the 1.2 g/kg Tree Tomato (Tamarillo) needs, so the standard 0.5 bags/acre is raised to 0.75. Split it across two applications to limit leaching.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag