Growing Coffee (Robusta) in Kwale
Soil suitability analysis based on Kwale's nutrient profile
Generally not ideal — Kwale is poorly suited to Coffee (Robusta). Kwale's soil (pH 6.76, near-neutral) gives Coffee (Robusta) a suitability score of 25/100. Match fertilizer to Kwale's nitrogen and phosphorus levels for the best result.
Kwale County is a challenging environment for Coffee (Robusta) (soil-match score 25/100) and will need significant amendment before planting. At an average pH of 6.76 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, phosphorus, and potassium — measured at N 0.93 g/kg, P 9.8 mg/kg, K 131 mg/kg against this crop's high/medium/high demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly sandy loam soils suit Coffee (Robusta), which favours loam. Kwale receives approximately 900 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 #63 soil match of the 106 crops we assess for Kwale County. Coffee (Robusta)'s full potential is about 950 kg/acre (~KES 76,000/acre at KES 80/kg), but at Kwale's 25/100 suitability a realistic target here is closer to 297 kg/acre (~KES 23,760/acre) unless the constraints above are addressed.
Better matched to Kwale's soil: Dhania, Pigeon Peas, and Mango — each scores higher on the same soil.
Soil & climate match
| Factor | Kwale soil | Coffee (Robusta) needs | Status |
|---|---|---|---|
| pH | 6.76 | 5–6.5 | Adjust |
| Nitrogen | 0.93 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 9.8 mg/kg | min 12 mg/kg | Low |
| Potassium | 131 mg/kg | min 200 mg/kg | Low |
| Rainfall | 900 mm | 1,500–2,500 mm | Low |
| Altitude | 200 m | 0–1,200 m | OK |
Planting calendar for Kwale
Long Rains· April–JuneMain season here
Short Rains· November–January
Dry Season· February–April
Top dressing guide
Kwale's nitrogen (0.93 g/kg) is 78% 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 Kwale's 200 m altitude and 900 mm rainfall, so all 2 are shown. Confirm with your agrovet before buying.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag