Growing Potato in Nairobi

Soil suitability analysis based on Nairobi's nutrient profile

Quick answer

Yes, with the right inputs — Nairobi is moderately suited to Potato. Nairobi's soil (pH 6.85, near-neutral) gives Potato a suitability score of 71/100. Match fertilizer to Nairobi's nitrogen and phosphorus levels for the best result.

Nairobi County is a solid choice for Potato, with a soil-match score of 71/100. At an average pH of 6.85 the soil sits above Potato's preferred 4.8–6.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 1.1 g/kg, P 22.1 mg/kg, K 236 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. Potato prefers sandy loam soils, while Nairobi is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Potato is the #77 soil match of the 106 crops we assess for Nairobi County. Potato's full potential is about 8,000 kg/acre (~KES 304,000/acre at KES 38/kg), but at Nairobi's 71/100 suitability a realistic target here is closer to 7,100 kg/acre (~KES 269,800/acre) unless the constraints above are addressed.

71Suitability score

Soil & climate match

FactorNairobi soilPotato needsStatus
pH6.854.8–6.5Adjust
Nitrogen1.1 g/kgmin 1.2 g/kgLow
Phosphorus22.1 mg/kgmin 20 mg/kgOK
Potassium236 mg/kgmin 200 mg/kgOK
Rainfall900 mm700–1,500 mmOK
Altitude1,700 m1,500–3,000 mOK

Planting calendar for Nairobi

Long Rains· March–MayMain season here

March
Planting Tubers & Basal Fertilizer (NPK)
April
Earthing Up & Top Dressing (CAN)
May
Pest Control (Blight) & Weeding

Short Rains· October–December

October
Planting & Basal Fertilizer
November
Earthing Up & Top Dressing
December
Blight Control

Dry Season· January–March

January
Harvesting & Storage
February
Land Resting
March
Seed Tuber Sprouting

Top dressing guide

Product
CAN
Timing
Week 3–4 after emergence
Instruction
Apply when plants are 15–20cm tall, before earthing up
Bags per acre in Nairobi
1.251

Nairobi's nitrogen (1.1 g/kg) is 92% of the 1.2 g/kg Potato needs, so the standard 1 bag/acre is raised to 1.25. Split it across two applications to limit leaching.

Seed varieties for Nairobi

14 potato varieties are rated for Nairobi's altitude (1,700 m) and rainfall (900 mm):

Shangi· Medium/HighlandUnica· Dryland/MediumTigoni· HighlandAsante· Medium/HighlandKenya Furaha· Medium/HighlandKenya Mpya· Medium/HighlandClone IG-70· HighlandDutch Robijn· HighlandKenya Baraka· HighlandSherekea· Medium/HighlandLenana· HighlandWanjiku· HighlandNyota· HighlandChulu· Highland
Full variety details — maturity, yield & breeder →

Economics

Market priceKES 38/kg
Expected yield in Nairobi7,100 kg/acre
Estimated revenueKES 269,800/acre
Adjusted for Nairobi's 71/100 suitability. Under ideal conditions Potato can reach 8,000 kg/acre (~KES 304,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureSandy Loam

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