Growing Coffee (Robusta) in Makueni
Soil suitability analysis based on Makueni's nutrient profile
Generally not ideal — Makueni is poorly suited to Coffee (Robusta). Makueni's soil (pH 7.5, alkaline) gives Coffee (Robusta) a suitability score of 9/100. Match fertilizer to Makueni's nitrogen and phosphorus levels for the best result.
Makueni County is a challenging environment for Coffee (Robusta) (soil-match score 9/100) and will need significant amendment before planting. At an average pH of 7.5 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 0.86 g/kg, P 29.6 mg/kg, K 351 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. Makueni receives approximately 600 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 Makueni County. Coffee (Robusta)'s full potential is about 950 kg/acre (~KES 76,000/acre at KES 80/kg), but at Makueni's 9/100 suitability a realistic target here is closer to 107 kg/acre (~KES 8,560/acre) unless the constraints above are addressed.
Better matched to Makueni's soil: Lucerne, Mango, and Sisal — each scores higher on the same soil.
Soil & climate match
| Factor | Makueni soil | Coffee (Robusta) needs | Status |
|---|---|---|---|
| pH | 7.5 | 5–6.5 | Adjust |
| Nitrogen | 0.86 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 29.6 mg/kg | min 12 mg/kg | OK |
| Potassium | 351 mg/kg | min 200 mg/kg | OK |
| Rainfall | 600 mm | 1,500–2,500 mm | Low |
| Altitude | 1,000 m | 0–1,200 m | OK |
Planting calendar for Makueni
Long Rains· March–May
Short Rains· October–DecemberMain season here
Dry Season· January–March
Top dressing guide
Makueni's nitrogen (0.86 g/kg) is 72% of the 1.2 g/kg Coffee (Robusta) needs, so the standard 1 bag/acre is raised to 1.25. Split it across two applications to limit leaching.
Recommended seed varieties
No variety in our list is specifically rated for Makueni's 1,000 m altitude and 600 mm rainfall, so all 2 are shown. Confirm with your agrovet before buying.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag