Growing Arrow Root in Makueni
Soil suitability analysis based on Makueni's nutrient profile
Generally not ideal — Makueni is poorly suited to Arrow Root. Makueni's soil (pH 7.5, alkaline) gives Arrow Root a suitability score of 23/100. Match fertilizer to Makueni's nitrogen and phosphorus levels for the best result.
Makueni County is a challenging environment for Arrow Root (soil-match score 23/100) and will need significant amendment before planting. At an average pH of 7.5 the soil sits above Arrow Root's preferred 5–7 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.86 g/kg), phosphorus (29.6 mg/kg) and potassium (351 mg/kg) all meet Arrow Root's requirements, so a maintenance fertilizer programme is enough. Arrow Root prefers clay loam soils, while Makueni is largely sandy loam, so drainage and organic-matter management matter more here. Makueni receives approximately 600 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 #84 soil match of the 106 crops we assess for Makueni County. Arrow Root's full potential is about 5,000 kg/acre (~KES 275,000/acre at KES 55/kg), but at Makueni's 23/100 suitability a realistic target here is closer to 1,438 kg/acre (~KES 79,090/acre) unless the constraints above are addressed.
Better matched to Makueni's soil: Lucerne, Mango, and Sisal — each scores higher on the same soil.
Soil & climate match
| Factor | Makueni soil | Arrow Root needs | Status |
|---|---|---|---|
| pH | 7.5 | 5–7 | Adjust |
| Nitrogen | 0.86 g/kg | min 0.8 g/kg | OK |
| Phosphorus | 29.6 mg/kg | min 12 mg/kg | OK |
| Potassium | 351 mg/kg | min 200 mg/kg | OK |
| Rainfall | 600 mm | 1,000–2,000 mm | Low |
| Altitude | 1,000 m | 0–1,800 m | OK |
Top dressing guide
Makueni's nitrogen (0.86 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 Makueni's 1,000 m altitude and 600 mm rainfall, so all 1 are shown. Confirm with your agrovet before buying.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag