Growing Watermelon in Busia

Soil suitability analysis based on Busia's nutrient profile

Quick answer

Generally not ideal — Busia is poorly suited to Watermelon. Busia's soil (pH 5.29, strongly acidic) gives Watermelon a suitability score of 34/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Busia County is a challenging environment for Watermelon (soil-match score 34/100) and will need significant amendment before planting. At an average pH of 5.29 the soil is moderately acidic, below Watermelon's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (0.91 g/kg), phosphorus (16.6 mg/kg) and potassium (175 mg/kg) all meet Watermelon's requirements, so a maintenance fertilizer programme is enough. Watermelon prefers sandy soils, while Busia is largely clay loam, so drainage and organic-matter management matter more here. Watermelon's full potential is about 15,000 kg/acre (~KES 150,000/acre at KES 10/kg), but at Busia's 34/100 suitability a realistic target here is closer to 6,375 kg/acre (~KES 63,750/acre) unless the constraints above are addressed.

34Suitability score

Soil & climate match

FactorBusia soilWatermelon needsStatus
pH5.2967.5Adjust
Nitrogen0.91 g/kgmin 0.8 g/kgOK
Phosphorus16.6 mg/kgmin 12 mg/kgOK
Potassium175 mg/kgmin 150 mg/kgOK
Rainfall1,400 mm300–700 mmHigh
Altitude1,200 m0–1,500 mOK

Top dressing guide

Product
CAN
Timing
Week 3-4 after transplanting
Instruction
Apply at vine development stage. Stop nitrogen at flowering — excess N promotes leaves over fruits.
Bags per Acre
0.5

Recommended seed varieties

Sugar BabyDryland/Medium
Simlaw Seeds · 75-90 days · 5–7.5 tons/acre
Small round fruits; sweet red flesh; popular local market.
Charleston GreyMedium
Simlaw Seeds · 80-95 days · 6–9 tons/acre
Large oblong fruits; excellent taste; high yield.

Economics

Market priceKES 10/kg
Expected yield in Busia6,375 kg/acre
Estimated revenueKES 63,750/acre
Adjusted for Busia's 34/100 suitability. Under ideal conditions Watermelon can reach 15,000 kg/acre (~KES 150,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureSandy

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