Growing Coffee (Robusta) in Machakos
Soil suitability analysis based on Machakos's nutrient profile
Generally not ideal — Machakos is poorly suited to Coffee (Robusta). Machakos's soil (pH 7.03, near-neutral) gives Coffee (Robusta) a suitability score of 14/100. Match fertilizer to Machakos's nitrogen and phosphorus levels for the best result.
Machakos County is a challenging environment for Coffee (Robusta) (soil-match score 14/100) and will need significant amendment before planting. At an average pH of 7.03 the soil sits above Coffee (Robusta)'s preferred 5–6.5 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/medium/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy loam soils suit Coffee (Robusta), which favours loam. Machakos receives approximately 700 mm/year — well below Coffee (Robusta)'s minimum of 1500 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Coffee (Robusta) is the #104 soil match of the 106 crops we assess for Machakos County. Coffee (Robusta)'s full potential is about 950 kg/acre (~KES 76,000/acre at KES 80/kg), but at Machakos's 14/100 suitability a realistic target here is closer to 166 kg/acre (~KES 13,280/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 | Coffee (Robusta) needs | Status |
|---|---|---|---|
| pH | 7.03 | 5–6.5 | Adjust |
| Nitrogen | 0.82 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 31.4 mg/kg | min 12 mg/kg | OK |
| Potassium | 338 mg/kg | min 200 mg/kg | OK |
| Rainfall | 700 mm | 1,500–2,500 mm | Low |
| Altitude | 1,100 m | 0–1,200 m | OK |
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 Coffee (Robusta) needs, so the standard 1 bag/acre is raised to 1.5. Split it across two applications to limit leaching.
Recommended seed varieties
No variety in our list is specifically rated for Machakos's 1,100 m altitude and 700 mm rainfall, so all 2 are shown. Confirm with your agrovet before buying.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag