Growing Tomato in Siaya

Soil suitability analysis based on Siaya's nutrient profile

Quick answer

Yes, with the right inputs — Siaya is moderately suited to Tomato. Siaya's soil (pH 5.33, strongly acidic) gives Tomato a suitability score of 64/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Siaya County is a solid choice for Tomato, with a soil-match score of 64/100. At an average pH of 5.33 the soil is moderately acidic, below Tomato's preferred 6–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is phosphorus and potassium — measured at N 1.2 g/kg, P 12.1 mg/kg, K 134 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly clay loam soils suit Tomato, which favours loam. On ShambaIQ's soil-match model, Tomato is the #55 soil match of the 106 crops we assess for Siaya County. Tomato's full potential is about 15,000 kg/acre (~KES 750,000/acre at KES 50/kg), but at Siaya's 64/100 suitability a realistic target here is closer to 12,000 kg/acre (~KES 600,000/acre) unless the constraints above are addressed.

64Suitability score

Soil & climate match

FactorSiaya soilTomato needsStatus
pH5.3367Adjust
Nitrogen1.2 g/kgmin 1.2 g/kgOK
Phosphorus12.1 mg/kgmin 20 mg/kgLow
Potassium134 mg/kgmin 200 mg/kgLow
Rainfall1,200 mm600–1,400 mmOK
Altitude1,200 m0–1,800 mOK

Planting calendar for Siaya

Long Rains· MarchMayMain season here

March
Nursery Preparation & Transplanting
April
Top Dressing & Staking & Pest Control
May
Harvesting & Disease Management

Short Rains· SeptemberNovember

September
Nursery & Transplanting & Basal Fertilizer
October
Staking & Top Dressing & Pest Control
November
Harvesting

Dry Season· JanuaryMarch

January
Land Preparation & Irrigation Setup
February
Nursery (irrigated)
March
Transplanting & Basal Fertilizer

Top dressing guide

Product
CAN
Timing
Week 3, 6, and 9
Instruction
Split into 3 applications. Add foliar potassium at fruiting stage.
Bags per acre in Siaya
0.5

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

Seed varieties for Siaya

Varieties suited to Siaya's 1,200 m altitude and 1,200 mm annual rainfall — 2 of 2 tomato varieties we list.

Rambo F1Medium/Highland
Royal Seeds · 75-80 days · 6–7.2 tons/acre
Determinate hybrid; excellent disease tolerance.
Money MakerMedium/Highland
Simlaw Seeds · 80-90 days · 4–4.8 tons/acre
Reliable open-pollinated variety.

Economics

Market priceKES 50/kg
Expected yield in Siaya12,000 kg/acre
Estimated revenueKES 600,000/acre
Adjusted for Siaya's 64/100 suitability. Under ideal conditions Tomato can reach 15,000 kg/acre (~KES 750,000/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