Growing Potato in Isiolo
Soil suitability analysis based on Isiolo's nutrient profile
Generally not ideal — Isiolo is poorly suited to Potato. Isiolo's soil (pH 7.83, alkaline) gives Potato a suitability score of 4/100. Match fertilizer to Isiolo's nitrogen and phosphorus levels for the best result.
Isiolo County is a challenging environment for Potato (soil-match score 4/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Potato's preferred 4.8–6.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.46 g/kg, P 37.4 mg/kg, K 395 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Potato, which favours sandy loam. Isiolo receives approximately 350 mm/year — well below Potato's minimum of 700 mm — so supplemental irrigation would be essential for this crop. Potato's full potential is about 8,000 kg/acre (~KES 304,000/acre at KES 38/kg), but at Isiolo's 4/100 suitability a realistic target here is closer to 400 kg/acre (~KES 15,200/acre) unless the constraints above are addressed.
Soil & climate match
| Factor | Isiolo soil | Potato needs | Status |
|---|---|---|---|
| pH | 7.83 | 4.8–6.5 | Adjust |
| Nitrogen | 0.46 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 37.4 mg/kg | min 20 mg/kg | OK |
| Potassium | 395 mg/kg | min 200 mg/kg | OK |
| Rainfall | 350 mm | 700–1,500 mm | Low |
| Altitude | 900 m | 1,500–3,000 m | Low |
Planting calendar
Long Rains
Short Rains
Dry Season
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag