Growing Oilseed Rape (Canola) in Kiambu
Soil suitability analysis based on Kiambu's nutrient profile
Yes, with the right inputs — Kiambu is moderately suited to Oilseed Rape (Canola). Kiambu's soil (pH 5.28, strongly acidic) gives Oilseed Rape (Canola) a suitability score of 56/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Oilseed Rape (Canola) can be grown in Kiambu County, but the soil scores 56/100 and needs targeted management to reach full potential. At an average pH of 5.28 the soil is moderately acidic, below Oilseed Rape (Canola)'s preferred 5.8–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is nitrogen and phosphorus — measured at N 1.01 g/kg, P 13.7 mg/kg, K 169 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing those deficits. Oilseed Rape (Canola) prefers loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Oilseed Rape (Canola) is the #76 soil match of the 106 crops we assess for Kiambu County. Oilseed Rape (Canola)'s full potential is about 1,000 kg/acre (~KES 60,000/acre at KES 60/kg), but at Kiambu's 56/100 suitability a realistic target here is closer to 700 kg/acre (~KES 42,000/acre) unless the constraints above are addressed.
Better matched to Kiambu's soil: Macadamia, Avocado, and Pineapple — each scores higher on the same soil.
Soil & climate match
| Factor | Kiambu soil | Oilseed Rape (Canola) needs | Status |
|---|---|---|---|
| pH | 5.28 | 5.8–7.5 | Adjust |
| Nitrogen | 1.01 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 13.7 mg/kg | min 20 mg/kg | Low |
| Potassium | 169 mg/kg | min 150 mg/kg | OK |
| Rainfall | 1,100 mm | 400–900 mm | High |
| Altitude | 1,700 m | 1,500–2,800 m | OK |
Planting calendar for Kiambu
Long Rains· March–MayMain season here
Short Rains· October–December
Top dressing guide
Kiambu's nitrogen (1.01 g/kg) is 84% of the 1.2 g/kg Oilseed Rape (Canola) needs, so the standard 0.5 bags/acre is raised to 0.75. Split it across two applications to limit leaching.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag