Growing Tree Tomato (Tamarillo) in Garissa
Soil suitability analysis based on Garissa's nutrient profile
Generally not ideal — Garissa is poorly suited to Tree Tomato (Tamarillo). Garissa's soil (pH 7.96, alkaline) gives Tree Tomato (Tamarillo) a suitability score of 0/100. Match fertilizer to Garissa's nitrogen and phosphorus levels for the best result.
Garissa County is a challenging environment for Tree Tomato (Tamarillo) (soil-match score 0/100) and will need significant amendment before planting. At an average pH of 7.96 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 0.61 g/kg, P 37.7 mg/kg, K 407 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. Tree Tomato (Tamarillo) prefers loam soils, while Garissa is largely sandy, so drainage and organic-matter management matter more here. Garissa receives approximately 250 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 #100 soil match of the 106 crops we assess for Garissa County. Tree Tomato (Tamarillo)'s full potential is about 8,000 kg/acre (~KES 640,000/acre at KES 80/kg), but at Garissa's 0/100 suitability a realistic target here is closer to 0 kg/acre (~KES 0/acre) unless the constraints above are addressed.
Better matched to Garissa's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.
Soil & climate match
| Factor | Garissa soil | Tree Tomato (Tamarillo) needs | Status |
|---|---|---|---|
| pH | 7.96 | 5.8–7 | Adjust |
| Nitrogen | 0.61 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 37.7 mg/kg | min 20 mg/kg | OK |
| Potassium | 407 mg/kg | min 200 mg/kg | OK |
| Rainfall | 250 mm | 800–1,800 mm | Low |
| Altitude | 200 m | 1,500–2,800 m | Low |
Planting calendar for Garissa
Long Rains· March–May
Short Rains· October–DecemberMain season here
Top dressing guide
Garissa's nitrogen (0.61 g/kg) is 51% 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