Growing Onion in Nandi

Soil suitability analysis based on Nandi's nutrient profile

Quick answer

Yes, with the right inputs — Nandi is moderately suited to Onion. Nandi's soil (pH 6.17, slightly acidic) gives Onion a suitability score of 73/100. Match fertilizer to Nandi's nitrogen and phosphorus levels for the best result.

Nandi County is a solid choice for Onion, with a soil-match score of 73/100. Local soils average pH 6.17 — slightly acidic to near-neutral and inside the 6–7 band Onion prefers, so no lime is usually required. Nitrogen (1.37 g/kg), phosphorus (26.4 mg/kg) and potassium (207 mg/kg) all meet Onion's requirements, so a maintenance fertilizer programme is enough. Onion prefers sandy loam soils, while Nandi is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Onion is the #64 soil match of the 106 crops we assess for Nandi County. At current prices (about KES 70/kg) and a typical 6,000 kg/acre yield, a well-managed Onion crop here can gross roughly KES 420,000 per acre.

73Suitability score

Soil & climate match

FactorNandi soilOnion needsStatus
pH6.1767OK
Nitrogen1.37 g/kgmin 1.2 g/kgOK
Phosphorus26.4 mg/kgmin 20 mg/kgOK
Potassium207 mg/kgmin 150 mg/kgOK
Rainfall1,400 mm500–1,000 mmHigh
Altitude1,900 m0–2,000 mOK

Planting calendar for Nandi

Long Rains· MarchMayMain season here

March
Nursery Preparation & Transplanting
April
Top Dressing (CAN) & Weed Control
May
Bulbing Stage & NPK 17:17:17 Application

Short Rains· AugustOctober

August
Nursery & Transplanting & Basal Fertilizer
September
Top Dressing & Bulb Formation
October
Harvesting & Curing

Dry Season· JanuaryMarch

January
Harvesting & Curing & Storage
February
Land Preparation
March
Nursery for next season

Top dressing guide

Product
CAN then NPK 17:17:17
Timing
Week 3–4 and at bulbing
Instruction
Apply at week 3–4 before bulbing then switch to NPK 17:17:17 at bulbing stage for bulb size and quality.
Bags per acre in Nandi
0.5

Nandi's nitrogen (1.37 g/kg) already meets Onion's 1.2 g/kg requirement, so this is a maintenance rate.

Seed varieties for Nandi

Varieties suited to Nandi's 1,900 m altitude and 1,400 mm annual rainfall — 2 of 2 onion varieties we list.

Red CreoleMedium/Highland
Simlaw Seeds · 90-120 days · 6–8 tons/acre
Popular red onion; good storage quality.
Bombay RedMedium
East Africa Seeds · 100-130 days · 5–7 tons/acre
Large bulb size; pungent flavor; high market value.

Economics

Market priceKES 70/kg
Expected yield in Nandi5,475 kg/acre
Estimated revenueKES 383,250/acre
Adjusted for Nandi's 73/100 suitability. Under ideal conditions Onion can reach 6,000 kg/acre (~KES 420,000/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