Growing Sorghum in Tharaka Nithi
Soil suitability analysis based on Tharaka Nithi's nutrient profile
Yes, with the right inputs — Tharaka Nithi is moderately suited to Sorghum. Tharaka Nithi's soil (pH 4.99, strongly acidic) gives Sorghum a suitability score of 59/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Sorghum can be grown in Tharaka Nithi County, but the soil scores 59/100 and needs targeted management to reach full potential. At an average pH of 4.99 the soil is strongly acidic, below Sorghum's preferred 5–8 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.23 g/kg), phosphorus (19.6 mg/kg) and potassium (211 mg/kg) all meet Sorghum's requirements, so a maintenance fertilizer programme is enough. Sorghum prefers clay soils, while Tharaka Nithi is largely sandy loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Sorghum is the #69 soil match of the 106 crops we assess for Tharaka Nithi County. Sorghum's full potential is about 1,200 kg/acre (~KES 81,600/acre at KES 68/kg), but at Tharaka Nithi's 59/100 suitability a realistic target here is closer to 885 kg/acre (~KES 60,180/acre) unless the constraints above are addressed.
Better matched to Tharaka Nithi's soil: Avocado, Macadamia, and Cassava — each scores higher on the same soil.
Soil & climate match
| Factor | Tharaka Nithi soil | Sorghum needs | Status |
|---|---|---|---|
| pH | 4.99 | 5–8 | Adjust |
| Nitrogen | 1.23 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 19.6 mg/kg | min 6 mg/kg | OK |
| Potassium | 211 mg/kg | min 100 mg/kg | OK |
| Rainfall | 900 mm | 250–700 mm | High |
| Altitude | 1,100 m | 0–1,800 m | OK |
Planting calendar for Tharaka Nithi
Long Rains· March–MayMain season here
Short Rains· October–December
Dry Season· January–March
Top dressing guide
Tharaka Nithi's nitrogen (1.23 g/kg) already meets Sorghum's 0.5 g/kg requirement, so this is a maintenance rate.
Seed varieties for Tharaka Nithi
Varieties suited to Tharaka Nithi's 1,100 m altitude and 900 mm annual rainfall — 2 of 2 sorghum varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag