Growing Broccoli in Kiambu
Soil suitability analysis based on Kiambu's nutrient profile
Possible but challenging — Kiambu is only marginally suited to Broccoli. Kiambu's soil (pH 5.28, strongly acidic) gives Broccoli a suitability score of 53/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Broccoli can be grown in Kiambu County, but the soil scores 53/100 and needs targeted management to reach full potential. At an average pH of 5.28 the soil is moderately acidic, below Broccoli's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is nitrogen, phosphorus, and potassium — measured at N 1.01 g/kg, P 13.7 mg/kg, K 169 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing those deficits. Broccoli prefers loam soils, while Kiambu is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Broccoli is the #84 soil match of the 106 crops we assess for Kiambu County. Broccoli's full potential is about 6,000 kg/acre (~KES 540,000/acre at KES 90/kg), but at Kiambu's 53/100 suitability a realistic target here is closer to 3,975 kg/acre (~KES 357,750/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 | Broccoli needs | Status |
|---|---|---|---|
| pH | 5.28 | 6–7.5 | 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 200 mg/kg | Low |
| Rainfall | 1,100 mm | 800–1,500 mm | OK |
| Altitude | 1,700 m | 1,800–2,800 m | Low |
Planting calendar
Long Rains
Short Rains
Dry Season
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag