Growing Potato in Kirinyaga
Soil suitability analysis based on Kirinyaga's nutrient profile
Yes — Kirinyaga is well suited to Potato. Kirinyaga's soil (pH 5.31, strongly acidic) gives Potato a suitability score of 83/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Kirinyaga County is well suited to Potato, scoring 83/100 on ShambaIQ's soil-match model. Local soils average pH 5.31 — moderately acidic and inside the 4.8–6.5 band Potato prefers, so no lime is usually required. The main gap is phosphorus and potassium — measured at N 1.36 g/kg, P 12.5 mg/kg, K 177 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing those deficits. Potato prefers sandy loam soils, while Kirinyaga is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Potato is the #16 soil match of the 106 crops we assess for Kirinyaga County. At current prices (about KES 38/kg) and a typical 8,000 kg/acre yield, a well-managed Potato crop here can gross roughly KES 304,000 per acre.
Soil & climate match
| Factor | Kirinyaga soil | Potato needs | Status |
|---|---|---|---|
| pH | 5.31 | 4.8–6.5 | OK |
| Nitrogen | 1.36 g/kg | min 1.2 g/kg | OK |
| Phosphorus | 12.5 mg/kg | min 20 mg/kg | Low |
| Potassium | 177 mg/kg | min 200 mg/kg | Low |
| Rainfall | 1,300 mm | 700–1,500 mm | OK |
| Altitude | 1,500 m | 1,500–3,000 m | OK |
Planting calendar for Kirinyaga
Long Rains· March–MayMain season here
Short Rains· October–December
Dry Season· January–March
Top dressing guide
Kirinyaga's nitrogen (1.36 g/kg) already meets Potato's 1.2 g/kg requirement, so this is a maintenance rate.
Seed varieties for Kirinyaga
6 potato varieties are rated for Kirinyaga's altitude (1,500 m) and rainfall (1,300 mm):
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag