Growing Carrot in Tana River

Soil suitability analysis based on Tana River's nutrient profile

Quick answer

Generally not ideal — Tana River is poorly suited to Carrot. Tana River's soil (pH 6.4, slightly acidic) gives Carrot a suitability score of 1/100. Match fertilizer to Tana River's nitrogen and phosphorus levels for the best result.

Tana River County is a challenging environment for Carrot (soil-match score 1/100) and will need significant amendment before planting. Local soils average pH 6.4 — slightly acidic to near-neutral and inside the 5.5–7 band Carrot prefers, so no lime is usually required. The main gap is phosphorus and potassium — measured at N 1.04 g/kg, P 8.5 mg/kg, K 108 mg/kg against this crop's low/medium/high demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly sandy soils suit Carrot, which favours sandy loam. Tana River receives approximately 400 mm/year — well below Carrot's minimum of 600 mm — so supplemental irrigation would be essential for this crop. Carrot's full potential is about 10,000 kg/acre (~KES 380,000/acre at KES 38/kg), but at Tana River's 1/100 suitability a realistic target here is closer to 125 kg/acre (~KES 4,750/acre) unless the constraints above are addressed.

1Suitability score

Soil & climate match

FactorTana River soilCarrot needsStatus
pH6.45.57OK
Nitrogen1.04 g/kgmin 0.5 g/kgOK
Phosphorus8.5 mg/kgmin 12 mg/kgLow
Potassium108 mg/kgmin 200 mg/kgLow
Rainfall400 mm600–1,200 mmLow
Altitude200 m1,000–2,500 mLow

Top dressing guide

Product
CAN
Timing
Week 4-5 after sowing
Instruction
Apply at thinning stage when roots begin swelling. Avoid over-application — causes forked roots.
Bags per Acre
0.5

Recommended seed varieties

NantesMedium/Highland
Simlaw Seeds · 70-80 days · 4–5 tons/acre
Cylindrical roots; sweet flavor; excellent fresh market variety.
ChantenayMedium
Simlaw Seeds · 75-90 days · 3.5–4.5 tons/acre
Broad shoulders; good for heavy soils; reliable yield.

Economics

Market priceKES 38/kg
Expected yield in Tana River125 kg/acre
Estimated revenueKES 4,750/acre
Adjusted for Tana River's 1/100 suitability. Under ideal conditions Carrot can reach 10,000 kg/acre (~KES 380,000/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(4,500)
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