Growing Sweet Corn in Murang'a

Soil suitability analysis based on Murang'a's nutrient profile

Quick answer

Yes, with the right inputs — Murang'a is moderately suited to Sweet Corn. Murang'a's soil (pH 5.03, strongly acidic) gives Sweet Corn a suitability score of 62/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Murang'a County is a solid choice for Sweet Corn, with a soil-match score of 62/100. At an average pH of 5.03 the soil is moderately acidic, below Sweet Corn'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 1.2 g/kg, P 12.2 mg/kg, K 168 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing that deficit. Sweet Corn prefers loam soils, while Murang'a is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Sweet Corn is the #54 soil match of the 106 crops we assess for Murang'a County. Sweet Corn's full potential is about 8,000 kg/acre (~KES 320,000/acre at KES 40/kg), but at Murang'a's 62/100 suitability a realistic target here is closer to 6,200 kg/acre (~KES 248,000/acre) unless the constraints above are addressed.

62Suitability score

Soil & climate match

FactorMurang'a soilSweet Corn needsStatus
pH5.035.87Adjust
Nitrogen1.2 g/kgmin 1.2 g/kgOK
Phosphorus12.2 mg/kgmin 20 mg/kgLow
Potassium168 mg/kgmin 150 mg/kgOK
Rainfall1,200 mm500–1,200 mmOK
Altitude1,500 m0–2,200 mOK

Planting calendar for Murang'a

Long Rains· MarchMayMain season here

March
Land Prep & Planting & Basal
April
Top Dressing & Weeding
May
Cob Fill & Harvest

Short Rains· OctoberDecember

October
Land Prep & Planting & Basal
November
Top Dressing & Weeding
December
Cob Fill & Harvest

Top dressing guide

Product
CAN
Timing
Week 4 to 6 at knee-high
Instruction
Top-dress at knee-high for cob fill. Harvest at milk stage for sweetness.
Bags per acre in Murang'a
0.5

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

Economics

Market priceKES 40/kg
Expected yield in Murang'a6,200 kg/acre
Estimated revenueKES 248,000/acre
Adjusted for Murang'a's 62/100 suitability. Under ideal conditions Sweet Corn can reach 8,000 kg/acre (~KES 320,000/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