Growing Rice (Upland) in Kiambu
Soil suitability analysis based on Kiambu's nutrient profile
Possible but challenging — Kiambu is only marginally suited to Rice (Upland). Kiambu's soil (pH 5.28, strongly acidic) gives Rice (Upland) a suitability score of 48/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Rice (Upland) can be grown in Kiambu County, but the soil scores 48/100 and needs targeted management to reach full potential. Local soils average pH 5.28 — moderately acidic and inside the 5–7 band Rice (Upland) prefers, so no lime is usually required. The main gap is nitrogen — measured at N 1.01 g/kg, P 13.7 mg/kg, K 169 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly clay soils suit Rice (Upland), which favours clay. At 1700 m, the county sits above Rice (Upland)'s preferred altitude ceiling of 1300 m, where frost risk and cold nights reduce the crop's productivity. On ShambaIQ's soil-match model, Rice (Upland) is the #91 soil match of the 106 crops we assess for Kiambu County. Rice (Upland)'s full potential is about 1,800 kg/acre (~KES 189,000/acre at KES 105/kg), but at Kiambu's 48/100 suitability a realistic target here is closer to 1,080 kg/acre (~KES 113,400/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 | Rice (Upland) needs | Status |
|---|---|---|---|
| pH | 5.28 | 5–7 | OK |
| Nitrogen | 1.01 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 13.7 mg/kg | min 12 mg/kg | OK |
| Potassium | 169 mg/kg | min 150 mg/kg | OK |
| Rainfall | 1,100 mm | 800–2,000 mm | OK |
| Altitude | 1,700 m | 0–1,300 m | High |
Top dressing guide
Kiambu's nitrogen (1.01 g/kg) is 84% of the 1.2 g/kg Rice (Upland) needs, so the standard 1 bag/acre is raised to 1.25. Split it across two applications to limit leaching.
Seed varieties for Kiambu
Varieties suited to Kiambu's 1,700 m altitude and 1,100 mm annual rainfall — 2 of 2 rice (upland) varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag