Growing Maize in Machakos

Soil suitability analysis based on Machakos's nutrient profile

Quick answer

Yes — Machakos is well suited to Maize. Machakos's soil (pH 7.03, near-neutral) gives Maize a suitability score of 77/100. Match fertilizer to Machakos's nitrogen and phosphorus levels for the best result.

Machakos County is well suited to Maize, scoring 77/100 on ShambaIQ's soil-match model. At an average pH of 7.03 the soil sits above Maize's preferred 5.5–7 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.82 g/kg, P 31.4 mg/kg, K 338 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit Maize, which favours loam. On ShambaIQ's soil-match model, Maize is the #56 soil match of the 106 crops we assess for Machakos County. At current prices (about KES 45/kg) and a typical 1,800 kg/acre yield, a well-managed Maize crop here can gross roughly KES 81,000 per acre.

77Suitability score

Soil & climate match

FactorMachakos soilMaize needsStatus
pH7.035.5–7Adjust
Nitrogen0.82 g/kgmin 1.2 g/kgLow
Phosphorus31.4 mg/kgmin 20 mg/kgOK
Potassium338 mg/kgmin 150 mg/kgOK
Rainfall700 mm500–1,600 mmOK
Altitude1,100 m0–2,500 mOK

Planting calendar for Machakos

Long Rains· March–May

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

Short Rains· October–DecemberMain season here

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 Machakos
1.51

Machakos's nitrogen (0.82 g/kg) is 68% of the 1.2 g/kg Maize needs, so the standard 1 bag/acre is raised to 1.5. Split it across two applications to limit leaching.

Seed varieties for Machakos

9 maize varieties are rated for Machakos's altitude (1,100 m) and rainfall (700 mm):

Katumani Composite B· DrylandDH04· DrylandH516· LowlandDH01· DrylandDH02· Dryland/MediumDH03· DrylandUkamez-2· Dryland/MediumUkamez-1· DrylandKH500-48A· Dryland/Medium
Full variety details — maturity, yield & breeder →

Economics

Market priceKES 45/kg
Expected yield in Machakos1,733 kg/acre
Estimated revenueKES 77,985/acre
Adjusted for Machakos's 77/100 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