Growing Rosemary in Nyeri
Soil suitability analysis based on Nyeri's nutrient profile
Possible but challenging — Nyeri is only marginally suited to Rosemary. Nyeri's soil (pH 5.23, strongly acidic) gives Rosemary a suitability score of 53/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Rosemary can be grown in Nyeri County, but the soil scores 53/100 and needs targeted management to reach full potential. At an average pH of 5.23 the soil is moderately acidic, below Rosemary's preferred 6–8 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.09 g/kg), phosphorus (15.5 mg/kg) and potassium (192 mg/kg) all meet Rosemary's requirements, so a maintenance fertilizer programme is enough. Rosemary prefers sandy loam soils, while Nyeri is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Rosemary is the #78 soil match of the 106 crops we assess for Nyeri County. Rosemary's full potential is about 2,500 kg/acre (~KES 375,000/acre at KES 150/kg), but at Nyeri's 53/100 suitability a realistic target here is closer to 1,656 kg/acre (~KES 248,400/acre) unless the constraints above are addressed.
Better matched to Nyeri's soil: Macadamia, Pineapple, and Avocado — each scores higher on the same soil.
Soil & climate match
| Factor | Nyeri soil | Rosemary needs | Status |
|---|---|---|---|
| pH | 5.23 | 6–8 | Adjust |
| Nitrogen | 1.09 g/kg | min 0.8 g/kg | OK |
| Phosphorus | 15.5 mg/kg | min 12 mg/kg | OK |
| Potassium | 192 mg/kg | min 150 mg/kg | OK |
| Rainfall | 1,200 mm | 400–900 mm | High |
| Altitude | 1,700 m | 800–2,400 m | OK |
Planting calendar for Nyeri
Long Rains· March–MayMain season here
Short Rains· October–December
Top dressing guide
Nyeri's nitrogen (1.09 g/kg) already meets Rosemary's 0.8 g/kg requirement, so this is a maintenance rate.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag