Growing Green Grams in Trans Nzoia
Soil suitability analysis based on Trans Nzoia's nutrient profile
Possible but challenging — Trans Nzoia is only marginally suited to Green Grams. Trans Nzoia's soil (pH 5.93, slightly acidic) gives Green Grams a suitability score of 48/100. Match fertilizer to Trans Nzoia's nitrogen and phosphorus levels for the best result.
Green Grams can be grown in Trans Nzoia County, but the soil scores 48/100 and needs targeted management to reach full potential. Local soils average pH 5.93 — slightly acidic to near-neutral and inside the 5.5–8 band Green Grams prefers, so no lime is usually required. Nitrogen (1.68 g/kg), phosphorus (27.3 mg/kg) and potassium (213 mg/kg) all meet Green Grams's requirements, so a maintenance fertilizer programme is enough. Green Grams prefers sandy loam soils, while Trans Nzoia is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Green Grams is the #93 soil match of the 106 crops we assess for Trans Nzoia County. Green Grams's full potential is about 400 kg/acre (~KES 48,000/acre at KES 120/kg), but at Trans Nzoia's 48/100 suitability a realistic target here is closer to 240 kg/acre (~KES 28,800/acre) unless the constraints above are addressed.
Better matched to Trans Nzoia's soil: Kale (Sukuma Wiki), Finger Millet, and Sweet Potato — each scores higher on the same soil.
Soil & climate match
| Factor | Trans Nzoia soil | Green Grams needs | Status |
|---|---|---|---|
| pH | 5.93 | 5.5–8 | OK |
| Nitrogen | 1.68 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 27.3 mg/kg | min 6 mg/kg | OK |
| Potassium | 213 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,200 mm | 250–700 mm | High |
| Altitude | 1,900 m | 0–1,800 m | High |
Top dressing guide
Trans Nzoia's nitrogen reads 1.68 g/kg, but the rate stays at zero: Green Grams is not top-dressed, for the crop-specific reason above.
Seed varieties for Trans Nzoia
2 green grams varieties are rated for Trans Nzoia's altitude (1,900 m) and rainfall (1,200 mm):
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag