Growing Rosemary in Samburu
Soil suitability analysis based on Samburu's nutrient profile
Possible but challenging — Samburu is only marginally suited to Rosemary. Samburu's soil (pH 8.28, alkaline) gives Rosemary a suitability score of 49/100. Match fertilizer to Samburu's nitrogen and phosphorus levels for the best result.
Rosemary can be grown in Samburu County, but the soil scores 49/100 and needs targeted management to reach full potential. At an average pH of 8.28 the soil sits above Rosemary's preferred 6–8 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.67 g/kg, P 42.1 mg/kg, K 387 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Rosemary, which favours sandy loam. On ShambaIQ's soil-match model, Rosemary is the #13 soil match of the 106 crops we assess for Samburu County. Rosemary's full potential is about 2,500 kg/acre (~KES 375,000/acre at KES 150/kg), but at Samburu's 49/100 suitability a realistic target here is closer to 1,531 kg/acre (~KES 229,650/acre) unless the constraints above are addressed.
Better matched to Samburu's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.
Soil & climate match
| Factor | Samburu soil | Rosemary needs | Status |
|---|---|---|---|
| pH | 8.28 | 6–8 | Adjust |
| Nitrogen | 0.67 g/kg | min 0.8 g/kg | Low |
| Phosphorus | 42.1 mg/kg | min 12 mg/kg | OK |
| Potassium | 387 mg/kg | min 150 mg/kg | OK |
| Rainfall | 350 mm | 400–900 mm | Low |
| Altitude | 900 m | 800–2,400 m | OK |
Planting calendar for Samburu
Long Rains· March–May
Short Rains· October–DecemberMain season here
Top dressing guide
Samburu's nitrogen (0.67 g/kg) is 84% of the 0.8 g/kg Rosemary needs, so the standard 0.2 bags/acre is raised to 0.25. Split it across two applications to limit leaching.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag