Is Nandi good for growing Watermelon?

Nandi County scores 27/100 for Watermelon suitability (poor). Soil pH is 6.17 against a preferred 6–7.5, nitrogen 1.37 g/kg and phosphorus 26.4 mg/kg. County rainfall is 1400 mm/year against Watermelon's 300–700 mm range. Soil amendments or irrigation may be needed before planting Watermelon.

What fertilizer is best for Watermelon in Nandi?

Base the plan on Nandi's soil: pH 6.17, nitrogen 1.37 g/kg and phosphorus 26.4 mg/kg. Get an exact bag-per-acre basal and top-dressing schedule free at https://shambaiq.com/app.

What soil pH does Watermelon need, and does Nandi have it?

Watermelon grows best at pH 6–7.5. Nandi averages pH 6.17, which is within that range.

How much can I earn from Watermelon per acre in Nandi?

At roughly KES 10/kg and an expected 15,000 kg/acre, gross revenue is about KES 150,000 per acre before input costs. Use the ShambaIQ budget tool for a net figure based on your fertilizer plan.

Growing Watermelon in Nandi

Soil suitability analysis based on Nandi's nutrient profile

Quick answer

Generally not ideal — Nandi is poorly suited to Watermelon. Nandi's soil (pH 6.17, slightly acidic) gives Watermelon a suitability score of 27/100. Match fertilizer to Nandi's nitrogen and phosphorus levels for the best result.

Nandi County is a challenging environment for Watermelon (soil-match score 27/100) and will need significant amendment before planting. Local soils average pH 6.17 — slightly acidic to near-neutral and inside the 6–7.5 band Watermelon prefers, so no lime is usually required. Nitrogen (1.37 g/kg), phosphorus (26.4 mg/kg) and potassium (207 mg/kg) all meet Watermelon's requirements, so a maintenance fertilizer programme is enough. Watermelon prefers sandy soils, while Nandi is largely clay loam, so drainage and organic-matter management matter more here. At 1900 m, the county sits above Watermelon's preferred altitude ceiling of 1500 m, where frost risk and cold nights reduce the crop's productivity. On ShambaIQ's soil-match model, Watermelon is the #104 soil match of the 106 crops we assess for Nandi County. Watermelon's full potential is about 15,000 kg/acre (~KES 150,000/acre at KES 10/kg), but at Nandi's 27/100 suitability a realistic target here is closer to 5,063 kg/acre (~KES 50,630/acre) unless the constraints above are addressed.

Better matched to Nandi's soil: Garden Peas, Maize, and Kale (Sukuma Wiki) — each scores higher on the same soil.

Suitability score

Soil & climate match

Factor	Nandi soil	Watermelon needs	Status
pH	6.17	6–7.5	OK
Nitrogen	1.37 g/kg	min 0.8 g/kg	OK
Phosphorus	26.4 mg/kg	min 12 mg/kg	OK
Potassium	207 mg/kg	min 150 mg/kg	OK
Rainfall	1,400 mm	300–700 mm	High
Altitude	1,900 m	0–1,500 m	High

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 in Nandi

0.5

Nandi's nitrogen (1.37 g/kg) already meets Watermelon's 0.8 g/kg requirement, so this is a maintenance rate.

Seed varieties for Nandi

Varieties suited to Nandi's 1,900 m altitude and 1,400 mm annual rainfall — 2 of 2 watermelon varieties we list.

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 Nandi5,063 kg/acre

Estimated revenueKES 50,630/acre

Adjusted for Nandi's 27/100 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(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

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