Growing Lettuce in Kirinyaga
Soil suitability analysis based on Kirinyaga's nutrient profile
Kirinyaga County is a solid choice for Lettuce, with a soil-match score of 70/100. At an average pH of 5.31 the soil is moderately acidic, below Lettuce's preferred 6–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.36 g/kg), phosphorus (12.5 mg/kg) and potassium (177 mg/kg) all meet Lettuce's requirements, so a maintenance fertilizer programme is enough. Lettuce prefers loam soils, while Kirinyaga is largely clay, so drainage and organic-matter management matter more here. Lettuce's full potential is about 7,000 kg/acre (~KES 350,000/acre at KES 50/kg), but at Kirinyaga's 70/100 suitability a realistic target here is closer to 6,125 kg/acre (~KES 306,250/acre) unless the constraints above are addressed.
Soil & climate match
| Factor | Kirinyaga soil | Lettuce needs | Status |
|---|---|---|---|
| pH | 5.31 | 6–7 | Adjust |
| Nitrogen | 1.36 g/kg | min 1.2 g/kg | OK |
| Phosphorus | 12.5 mg/kg | min 12 mg/kg | OK |
| Potassium | 177 mg/kg | min 150 mg/kg | OK |
| Rainfall | 1,300 mm | 600–1,200 mm | High |
| Altitude | 1,500 m | 800–2,500 m | OK |
Planting calendar
Long Rains
Short Rains
Top dressing guide
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag