Growing Quinoa in Kiambu
Soil suitability analysis based on Kiambu's nutrient profile
Possible but challenging — Kiambu is only marginally suited to Quinoa. Kiambu's soil (pH 5.28, strongly acidic) gives Quinoa a suitability score of 49/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Quinoa can be grown in Kiambu County, but the soil scores 49/100 and needs targeted management to reach full potential. At an average pH of 5.28 the soil is moderately acidic, below Quinoa's preferred 6–8.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.01 g/kg), phosphorus (13.7 mg/kg) and potassium (169 mg/kg) all meet Quinoa's requirements, so a maintenance fertilizer programme is enough. Quinoa prefers loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Quinoa is the #90 soil match of the 106 crops we assess for Kiambu County. Quinoa's full potential is about 700 kg/acre (~KES 105,000/acre at KES 150/kg), but at Kiambu's 49/100 suitability a realistic target here is closer to 429 kg/acre (~KES 64,350/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 | Quinoa needs | Status |
|---|---|---|---|
| pH | 5.28 | 6–8.5 | Adjust |
| Nitrogen | 1.01 g/kg | min 0.8 g/kg | OK |
| Phosphorus | 13.7 mg/kg | min 12 mg/kg | OK |
| Potassium | 169 mg/kg | min 150 mg/kg | OK |
| Rainfall | 1,100 mm | 300–800 mm | High |
| Altitude | 1,700 m | 1,500–3,000 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) already meets Quinoa's 0.8 g/kg requirement, so this is a maintenance rate.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag