Growing Rosemary in Marsabit
Soil suitability analysis based on Marsabit's nutrient profile
Generally not ideal — Marsabit is poorly suited to Rosemary. Marsabit's soil (pH 8.22, alkaline) gives Rosemary a suitability score of 36/100. Match fertilizer to Marsabit's nitrogen and phosphorus levels for the best result.
Marsabit County is a challenging environment for Rosemary (soil-match score 36/100) and will need significant amendment before planting. At an average pH of 8.22 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 0.52 g/kg, P 37.3 mg/kg, K 420 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 #15 soil match of the 106 crops we assess for Marsabit County. Rosemary's full potential is about 2,500 kg/acre (~KES 375,000/acre at KES 150/kg), but at Marsabit's 36/100 suitability a realistic target here is closer to 1,125 kg/acre (~KES 168,750/acre) unless the constraints above are addressed.
Better matched to Marsabit's soil: Sisal, Chia, and Aloe Vera — each scores higher on the same soil.
Soil & climate match
| Factor | Marsabit soil | Rosemary needs | Status |
|---|---|---|---|
| pH | 8.22 | 6–8 | Adjust |
| Nitrogen | 0.52 g/kg | min 0.8 g/kg | Low |
| Phosphorus | 37.3 mg/kg | min 12 mg/kg | OK |
| Potassium | 420 mg/kg | min 150 mg/kg | OK |
| Rainfall | 300 mm | 400–900 mm | Low |
| Altitude | 1,100 m | 800–2,400 m | OK |
Planting calendar for Marsabit
Long Rains· March–May
Short Rains· October–DecemberMain season here
Top dressing guide
Marsabit's nitrogen (0.52 g/kg) is 65% 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