Growing Sweet Corn in Tana River

Soil suitability analysis based on Tana River's nutrient profile

Sweet Corn can be grown in Tana River County, but the soil scores 49/100 and needs targeted management to reach full potential. Local soils average pH 6.4 — slightly acidic to near-neutral and inside the 5.8–7 band Sweet Corn prefers, so no lime is usually required. The main gap is nitrogen, phosphorus, and potassium — measured at N 1.04 g/kg, P 8.5 mg/kg, K 108 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing those deficits. Sweet Corn prefers loam soils, while Tana River is largely sandy, so drainage and organic-matter management matter more here. Sweet Corn's full potential is about 8,000 kg/acre (~KES 320,000/acre at KES 40/kg), but at Tana River's 49/100 suitability a realistic target here is closer to 4,900 kg/acre (~KES 196,000/acre) unless the constraints above are addressed.

49Suitability score

Soil & climate match

FactorTana River soilSweet Corn needsStatus
pH6.45.87OK
Nitrogen1.04 g/kgmin 1.2 g/kgLow
Phosphorus8.5 mg/kgmin 20 mg/kgLow
Potassium108 mg/kgmin 150 mg/kgLow
Rainfall400 mm500–1,200 mmLow
Altitude200 m0–2,200 mOK

Planting calendar

Long Rains

Month 1
Land Prep & Planting & Basal
Month 2
Top Dressing & Weeding
Month 3
Cob Fill & Harvest

Short Rains

Month 1
Land Prep & Planting & Basal
Month 2
Top Dressing & Weeding
Month 3
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
0.5

Economics

Market priceKES 40/kg
Expected yield in Tana River4,900 kg/acre
Estimated revenueKES 196,000/acre
Adjusted for Tana River's 49/100 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(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