Growing Coffee (Robusta) in Laikipia

Soil suitability analysis based on Laikipia's nutrient profile

Laikipia County is a challenging environment for Coffee (Robusta) (soil-match score 7/100) and will need significant amendment before planting. At an average pH of 4.99 the soil is strongly acidic, below Coffee (Robusta)'s preferred 5–6.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.42 g/kg), phosphorus (16.6 mg/kg) and potassium (215 mg/kg) all meet Coffee (Robusta)'s requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Coffee (Robusta), which favours loam. Laikipia receives approximately 600 mm/year — well below Coffee (Robusta)'s minimum of 1500 mm — so supplemental irrigation would be essential for this crop. Coffee (Robusta)'s full potential is about 950 kg/acre (~KES 76,000/acre at KES 80/kg), but at Laikipia's 7/100 suitability a realistic target here is closer to 83 kg/acre (~KES 6,640/acre) unless the constraints above are addressed.