Growing Pumpkin in Nyandarua

Soil suitability analysis based on Nyandarua's nutrient profile

Quick answer

Yes, with the right inputs — Nyandarua is moderately suited to Pumpkin. Nyandarua's soil (pH 5.38, strongly acidic) gives Pumpkin a suitability score of 59/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Pumpkin can be grown in Nyandarua County, but the soil scores 59/100 and needs targeted management to reach full potential. At an average pH of 5.38 the soil is moderately acidic, below Pumpkin's preferred 5.8–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is potassium — measured at N 1.28 g/kg, P 14 mg/kg, K 166 mg/kg against this crop's medium/medium/high demand — so the fertilizer plan below prioritises closing that deficit. Pumpkin prefers sandy loam soils, while Nyandarua is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Pumpkin is the #47 soil match of the 106 crops we assess for Nyandarua County. Pumpkin's full potential is about 10,000 kg/acre (~KES 300,000/acre at KES 30/kg), but at Nyandarua's 59/100 suitability a realistic target here is closer to 7,375 kg/acre (~KES 221,250/acre) unless the constraints above are addressed.

Better matched to Nyandarua's soil: Tea, Pyrethrum, and Potato — each scores higher on the same soil.

59Suitability score

Soil & climate match

FactorNyandarua soilPumpkin needsStatus
pH5.385.87.5Adjust
Nitrogen1.28 g/kgmin 0.8 g/kgOK
Phosphorus14 mg/kgmin 12 mg/kgOK
Potassium166 mg/kgmin 200 mg/kgLow
Rainfall1,100 mm500–1,200 mmOK
Altitude2,300 m0–2,100 mHigh

Planting calendar for Nyandarua

Long Rains· MarchMayMain season here

March
Direct Sowing & Basal
April
Vine Management & Top Dressing
May
Fruit Development & Harvest

Short Rains· OctoberDecember

October
Direct Sowing & Basal
November
Vine Management
December
Fruit Development & Harvest

Top dressing guide

Product
CAN
Timing
Week 4 and at vine-run
Instruction
Top-dress when vines begin to run. Add potassium at fruit set.
Bags per acre in Nyandarua
0.50.4

Nyandarua's nitrogen (1.28 g/kg) already meets Pumpkin's 0.8 g/kg requirement, so this is a maintenance rate.

Economics

Market priceKES 30/kg
Expected yield in Nyandarua7,375 kg/acre
Estimated revenueKES 221,250/acre
Adjusted for Nyandarua's 59/100 suitability. Under ideal conditions Pumpkin can reach 10,000 kg/acre (~KES 300,000/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(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