Growing Cashew Nuts in Isiolo
Soil suitability analysis based on Isiolo's nutrient profile
Generally not ideal — Isiolo is poorly suited to Cashew Nuts. Isiolo's soil (pH 7.83, alkaline) gives Cashew Nuts a suitability score of 7/100. Match fertilizer to Isiolo's nitrogen and phosphorus levels for the best result.
Isiolo County is a challenging environment for Cashew Nuts (soil-match score 7/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Cashew Nuts's preferred 5–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.46 g/kg, P 37.4 mg/kg, K 395 mg/kg against this crop's low/low/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Cashew Nuts, which favours sandy. Isiolo receives approximately 350 mm/year — well below Cashew Nuts's minimum of 600 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Cashew Nuts is the #82 soil match of the 106 crops we assess for Isiolo County. Cashew Nuts's full potential is about 900 kg/acre (~KES 247,500/acre at KES 275/kg), but at Isiolo's 7/100 suitability a realistic target here is closer to 79 kg/acre (~KES 21,725/acre) unless the constraints above are addressed.
Better matched to Isiolo's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.
Soil & climate match
| Factor | Isiolo soil | Cashew Nuts needs | Status |
|---|---|---|---|
| pH | 7.83 | 5–7.5 | Adjust |
| Nitrogen | 0.46 g/kg | min 0.5 g/kg | Low |
| Phosphorus | 37.4 mg/kg | min 6 mg/kg | OK |
| Potassium | 395 mg/kg | min 150 mg/kg | OK |
| Rainfall | 350 mm | 600–1,500 mm | Low |
| Altitude | 900 m | 0–500 m | High |
Planting calendar for Isiolo
Long Rains· March–May
Short Rains· October–DecemberMain season here
Dry Season· January–March
Top dressing guide
Isiolo's nitrogen (0.46 g/kg) is 92% of the 0.5 g/kg Cashew Nuts needs, so the standard 0.3 bags/acre is raised to 0.5. Split it across two applications to limit leaching.
Seed varieties for Isiolo
Varieties suited to Isiolo's 900 m altitude and 350 mm annual rainfall — 1 of 2 cashew nuts varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag