Growing Arrow Root in Machakos
Soil suitability analysis based on Machakos's nutrient profile
Generally not ideal — Machakos is poorly suited to Arrow Root. Machakos's soil (pH 7.03, near-neutral) gives Arrow Root a suitability score of 37/100. Match fertilizer to Machakos's nitrogen and phosphorus levels for the best result.
Machakos County is a challenging environment for Arrow Root (soil-match score 37/100) and will need significant amendment before planting. At an average pH of 7.03 the soil sits above Arrow Root's preferred 5–7 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.82 g/kg), phosphorus (31.4 mg/kg) and potassium (338 mg/kg) all meet Arrow Root's requirements, so a maintenance fertilizer programme is enough. Arrow Root prefers clay loam soils, while Machakos is largely sandy loam, so drainage and organic-matter management matter more here. Machakos receives approximately 700 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 #85 soil match of the 106 crops we assess for Machakos County. Arrow Root's full potential is about 5,000 kg/acre (~KES 275,000/acre at KES 55/kg), but at Machakos's 37/100 suitability a realistic target here is closer to 2,313 kg/acre (~KES 127,215/acre) unless the constraints above are addressed.
Better matched to Machakos's soil: Mango, Sisal, and Moringa — each scores higher on the same soil.
Soil & climate match
| Factor | Machakos soil | Arrow Root needs | Status |
|---|---|---|---|
| pH | 7.03 | 5–7 | Adjust |
| Nitrogen | 0.82 g/kg | min 0.8 g/kg | OK |
| Phosphorus | 31.4 mg/kg | min 12 mg/kg | OK |
| Potassium | 338 mg/kg | min 200 mg/kg | OK |
| Rainfall | 700 mm | 1,000–2,000 mm | Low |
| Altitude | 1,100 m | 0–1,800 m | OK |
Top dressing guide
Machakos's nitrogen (0.82 g/kg) already meets Arrow Root's 0.8 g/kg requirement, so this is a maintenance rate.
Recommended seed varieties
No variety in our list is specifically rated for Machakos's 1,100 m altitude and 700 mm rainfall, so all 1 are shown. Confirm with your agrovet before buying.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag