Growing Broccoli in Kirinyaga
Soil suitability analysis based on Kirinyaga's nutrient profile
Possible but challenging — Kirinyaga is only marginally suited to Broccoli. Kirinyaga's soil (pH 5.31, strongly acidic) gives Broccoli a suitability score of 43/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Kirinyaga County is a challenging environment for Broccoli (soil-match score 43/100) and will need significant amendment before planting. At an average pH of 5.31 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 phosphorus and potassium — measured at N 1.36 g/kg, P 12.5 mg/kg, K 177 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing those deficits. Broccoli prefers loam soils, while Kirinyaga is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Broccoli is the #92 soil match of the 106 crops we assess for Kirinyaga County. Broccoli's full potential is about 6,000 kg/acre (~KES 540,000/acre at KES 90/kg), but at Kirinyaga's 43/100 suitability a realistic target here is closer to 3,225 kg/acre (~KES 290,250/acre) unless the constraints above are addressed.
Better matched to Kirinyaga's soil: Tea, Macadamia, and Pineapple — each scores higher on the same soil.
Soil & climate match
| Factor | Kirinyaga soil | Broccoli needs | Status |
|---|---|---|---|
| pH | 5.31 | 6–7.5 | Adjust |
| Nitrogen | 1.36 g/kg | min 1.2 g/kg | OK |
| Phosphorus | 12.5 mg/kg | min 20 mg/kg | Low |
| Potassium | 177 mg/kg | min 200 mg/kg | Low |
| Rainfall | 1,300 mm | 800–1,500 mm | OK |
| Altitude | 1,500 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