Growing Maize 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 Maize. Murang'a's soil (pH 5.03, strongly acidic) gives Maize a suitability score of 66/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Murang'a County is a solid choice for Maize, with a soil-match score of 66/100. At an average pH of 5.03 the soil is moderately acidic, below Maize's preferred 5.5–7 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. Maize prefers loam soils, while Murang'a is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Maize is the #36 soil match of the 106 crops we assess for Murang'a County. Maize's full potential is about 1,800 kg/acre (~KES 81,000/acre at KES 45/kg), but at Murang'a's 66/100 suitability a realistic target here is closer to 1,485 kg/acre (~KES 66,825/acre) unless the constraints above are addressed.

66Suitability score

Soil & climate match

FactorMurang'a soilMaize needsStatus
pH5.035.5–7Adjust
Nitrogen1.2 g/kgmin 1.2 g/kgOK
Phosphorus12.2 mg/kgmin 20 mg/kgLow
Potassium168 mg/kgmin 150 mg/kgOK
Rainfall1,200 mm500–1,600 mmOK
Altitude1,500 m0–2,500 mOK

Planting calendar for Murang'a

Long Rains· March–MayMain season here

March
Sowing & Basal Fertilizer (DAP/NPK)
April
Top Dressing (CAN/Urea) & 1st Weeding
May
Crop Protection & Scouting

Short Rains· October–December

October
Fast Sowing & Basal Fertilizer
November
Top Dressing & Weeding
December
Fast Growth Scouting

Dry Season· January–March

January
Land Preparation & Manure
February
Soil Testing & Resting
March
Seed Selection & Storage

Top dressing guide

Product
CAN
Timing
Week 4–6 after germination
Instruction
When plant is knee-high broadcast between rows
Bags per acre in Murang'a
1

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

Seed varieties for Murang'a

11 maize varieties are rated for Murang'a's altitude (1,500 m) and rainfall (1,200 mm):

H513· Medium AltitudeH623· Medium/HighlandDH02· Dryland/MediumWH403· MediumWH507· Medium/HighlandUkamez-2· Dryland/MediumEmbu-537· Medium/HighlandKH500-48A· Dryland/MediumFAWTH2001· Medium/HighlandFAWTH2002· Medium/HighlandFAWTH2003· Medium/Highland
Full variety details — maturity, yield & breeder →

Economics

Market priceKES 45/kg
Expected yield in Murang'a1,485 kg/acre
Estimated revenueKES 66,825/acre
Adjusted for Murang'a's 66/100 suitability. Under ideal conditions Maize can reach 1,800 kg/acre (~KES 81,000/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