Growing Tree Tomato (Tamarillo) in Laikipia

Soil suitability analysis based on Laikipia's nutrient profile

Quick answer

Generally not ideal — Laikipia is poorly suited to Tree Tomato (Tamarillo). Laikipia's soil (pH 4.99, strongly acidic) gives Tree Tomato (Tamarillo) a suitability score of 37/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Laikipia County is a challenging environment for Tree Tomato (Tamarillo) (soil-match score 37/100) and will need significant amendment before planting. At an average pH of 4.99 the soil is strongly acidic, below Tree Tomato (Tamarillo)'s preferred 5.8–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is phosphorus — measured at N 1.42 g/kg, P 16.6 mg/kg, K 215 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. On ShambaIQ's soil-match model, Tree Tomato (Tamarillo) is the #83 soil match of the 106 crops we assess for Laikipia County. Tree Tomato (Tamarillo)'s full potential is about 8,000 kg/acre (~KES 640,000/acre at KES 80/kg), but at Laikipia's 37/100 suitability a realistic target here is closer to 3,700 kg/acre (~KES 296,000/acre) unless the constraints above are addressed.

Better matched to Laikipia's soil: Sweet Potato, Finger Millet, and Groundnuts — each scores higher on the same soil.

37Suitability score

Soil & climate match

FactorLaikipia soilTree Tomato (Tamarillo) needsStatus
pH4.995.87Adjust
Nitrogen1.42 g/kgmin 1.2 g/kgOK
Phosphorus16.6 mg/kgmin 20 mg/kgLow
Potassium215 mg/kgmin 200 mg/kgOK
Rainfall600 mm800–1,800 mmLow
Altitude1,700 m1,500–2,800 mOK

Planting calendar for Laikipia

Long Rains· AprilJuneMain season here

April
Transplanting & Basal
May
Staking & Top Dressing
June
Fruit Development

Short Rains· OctoberDecember

October
Transplanting & Basal
November
Staking & Top Dressing
December
Fruit Development

Top dressing guide

Product
CAN
Timing
Every 3 months
Instruction
Perennial — ring-apply around the drip line each quarter. Add NPK at flowering.
Bags per acre in Laikipia
0.5

Laikipia's nitrogen (1.42 g/kg) already meets Tree Tomato (Tamarillo)'s 1.2 g/kg requirement, so this is a maintenance rate.

Economics

Market priceKES 80/kg
Expected yield in Laikipia3,700 kg/acre
Estimated revenueKES 296,000/acre
Adjusted for Laikipia's 37/100 suitability. Under ideal conditions Tree Tomato (Tamarillo) can reach 8,000 kg/acre (~KES 640,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureLoam

Fertilizer prices

DAP
KES 3,500(6,500)
CAN
KES 2,875(5,700)
NPK 17:17:17
KES 3,275(5,600)
Urea
KES 3,500(5,500)
Lime
KES 1,500(1,800)

Green = subsidized · (Commercial) per 50kg bag