Growing Potato in Machakos
Soil suitability analysis based on Machakos's nutrient profile
Generally not ideal — Machakos is poorly suited to Potato. Machakos's soil (pH 7.03, near-neutral) gives Potato a suitability score of 34/100. Match fertilizer to Machakos's nitrogen and phosphorus levels for the best result.
Machakos County is a challenging environment for Potato (soil-match score 34/100) and will need significant amendment before planting. At an average pH of 7.03 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 0.82 g/kg, P 31.4 mg/kg, K 338 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit Potato, which favours sandy loam. On ShambaIQ's soil-match model, Potato is the #87 soil match of the 106 crops we assess for Machakos County. Potato's full potential is about 8,000 kg/acre (~KES 304,000/acre at KES 38/kg), but at Machakos's 34/100 suitability a realistic target here is closer to 3,400 kg/acre (~KES 129,200/acre) unless the constraints above are addressed.
Better matched to Machakos's soil: Mango, Sisal, and Moringa — each scores higher on the same soil.
Soil & climate match
| Factor | Machakos soil | Potato needs | Status |
|---|---|---|---|
| pH | 7.03 | 4.8–6.5 | Adjust |
| Nitrogen | 0.82 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 31.4 mg/kg | min 20 mg/kg | OK |
| Potassium | 338 mg/kg | min 200 mg/kg | OK |
| Rainfall | 700 mm | 700–1,500 mm | OK |
| Altitude | 1,100 m | 1,500–3,000 m | Low |
Planting calendar for Machakos
Long Rains· March–May
Short Rains· October–DecemberMain season here
Dry Season· January–March
Top dressing guide
Machakos's nitrogen (0.82 g/kg) is 68% of the 1.2 g/kg Potato needs, so the standard 1 bag/acre is raised to 1.5. Split it across two applications to limit leaching.
Seed varieties for Machakos
Varieties suited to Machakos's 1,100 m altitude and 700 mm annual rainfall — 1 of 14 potato varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag