Growing Arrow Root in Wajir
Soil suitability analysis based on Wajir's nutrient profile
Generally not ideal — Wajir is poorly suited to Arrow Root. Wajir's soil (pH 8.4, alkaline) gives Arrow Root a suitability score of 2/100. Match fertilizer to Wajir's nitrogen and phosphorus levels for the best result.
Wajir County is a challenging environment for Arrow Root (soil-match score 2/100) and will need significant amendment before planting. At an average pH of 8.4 the soil sits above Arrow Root's preferred 5–7 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.52 g/kg, P 39.3 mg/kg, K 396 mg/kg against this crop's medium/medium/high demand — so the fertilizer plan below prioritises closing that deficit. Arrow Root prefers clay loam soils, while Wajir is largely sandy, so drainage and organic-matter management matter more here. Wajir receives approximately 200 mm/year — well below Arrow Root's minimum of 1000 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Arrow Root is the #55 soil match of the 106 crops we assess for Wajir County. Arrow Root's full potential is about 5,000 kg/acre (~KES 275,000/acre at KES 55/kg), but at Wajir's 2/100 suitability a realistic target here is closer to 125 kg/acre (~KES 6,875/acre) unless the constraints above are addressed.
Better matched to Wajir's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.
Soil & climate match
| Factor | Wajir soil | Arrow Root needs | Status |
|---|---|---|---|
| pH | 8.4 | 5–7 | Adjust |
| Nitrogen | 0.52 g/kg | min 0.8 g/kg | Low |
| Phosphorus | 39.3 mg/kg | min 12 mg/kg | OK |
| Potassium | 396 mg/kg | min 200 mg/kg | OK |
| Rainfall | 200 mm | 1,000–2,000 mm | Low |
| Altitude | 250 m | 0–1,800 m | OK |
Top dressing guide
Wajir's nitrogen (0.52 g/kg) is 65% of the 0.8 g/kg Arrow Root needs, so the standard 0.5 bags/acre is raised to 0.75. Split it across two applications to limit leaching.
Recommended seed varieties
No variety in our list is specifically rated for Wajir's 250 m altitude and 200 mm rainfall, so all 1 are shown. Confirm with your agrovet before buying.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag