Growing Mint in Kitui

Soil suitability analysis based on Kitui's nutrient profile

Quick answer

Possible but challenging — Kitui is only marginally suited to Mint. Kitui's soil (pH 7.03, near-neutral) gives Mint a suitability score of 42/100. Match fertilizer to Kitui's nitrogen and phosphorus levels for the best result.

Kitui County is a challenging environment for Mint (soil-match score 42/100) and will need significant amendment before planting. Local soils average pH 7.03 — neutral and inside the 6–7.5 band Mint prefers, so no lime is usually required. The main gap is nitrogen — measured at N 0.74 g/kg, P 30.5 mg/kg, K 339 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit Mint, which favours loam. Kitui receives approximately 500 mm/year — well below Mint's minimum of 700 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Mint is the #63 soil match of the 106 crops we assess for Kitui County. Mint's full potential is about 4,000 kg/acre (~KES 400,000/acre at KES 100/kg), but at Kitui's 42/100 suitability a realistic target here is closer to 2,100 kg/acre (~KES 210,000/acre) unless the constraints above are addressed.

Better matched to Kitui's soil: Mango, Sisal, and Moringa — each scores higher on the same soil.

42Suitability score

Soil & climate match

FactorKitui soilMint needsStatus
pH7.0367.5OK
Nitrogen0.74 g/kgmin 1.2 g/kgLow
Phosphorus30.5 mg/kgmin 12 mg/kgOK
Potassium339 mg/kgmin 150 mg/kgOK
Rainfall500 mm700–1,400 mmLow
Altitude900 m500–2,200 mOK

Planting calendar for Kitui

Long Rains· MarchMay

March
Runner Planting & Basal
April
Weeding & Top Dressing
May
Continuous Harvest

Short Rains· OctoberDecemberMain season here

October
Runner Planting & Basal
November
Weeding & Top Dressing
December
Continuous Harvest

Top dressing guide

Product
CAN
Timing
Week 3 and after each cutting
Instruction
Top-dress after each cut for vigorous regrowth. Keep soil consistently moist.
Bags per acre in Kitui
0.50.3

Kitui's nitrogen (0.74 g/kg) is 62% of the 1.2 g/kg Mint needs, so the standard 0.3 bags/acre is raised to 0.5. Split it across two applications to limit leaching.

Economics

Market priceKES 100/kg
Expected yield in Kitui2,100 kg/acre
Estimated revenueKES 210,000/acre
Adjusted for Kitui's 42/100 suitability. Under ideal conditions Mint can reach 4,000 kg/acre (~KES 400,000/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