Growing Sunflower in Samburu
Soil suitability analysis based on Samburu's nutrient profile
Possible but challenging — Samburu is only marginally suited to Sunflower. Samburu's soil (pH 8.28, alkaline) gives Sunflower a suitability score of 45/100. Match fertilizer to Samburu's nitrogen and phosphorus levels for the best result.
Sunflower can be grown in Samburu County, but the soil scores 45/100 and needs targeted management to reach full potential. At an average pH of 8.28 the soil sits above Sunflower's preferred 6–7.5 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 Sunflower, which favours sandy. On ShambaIQ's soil-match model, Sunflower is the #15 soil match of the 106 crops we assess for Samburu County. Sunflower's full potential is about 750 kg/acre (~KES 36,000/acre at KES 48/kg), but at Samburu's 45/100 suitability a realistic target here is closer to 422 kg/acre (~KES 20,256/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 | Sunflower needs | Status |
|---|---|---|---|
| pH | 8.28 | 6–7.5 | 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 | 400–800 mm | Low |
| Altitude | 900 m | 0–2,000 m | OK |
Planting calendar for Samburu
Long Rains· March–May
Short Rains· October–DecemberMain season here
Dry Season· January–March
Top dressing guide
Samburu's nitrogen (0.67 g/kg) is 84% of the 0.8 g/kg Sunflower needs, so the standard 0.5 bags/acre is raised to 0.75. Split it across two applications to limit leaching.
Seed varieties for Samburu
Varieties suited to Samburu's 900 m altitude and 350 mm annual rainfall — 1 of 2 sunflower varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag