Growing Chia in Tharaka Nithi
Soil suitability analysis based on Tharaka Nithi's nutrient profile
Yes, with the right inputs — Tharaka Nithi is moderately suited to Chia. Tharaka Nithi's soil (pH 4.99, strongly acidic) gives Chia a suitability score of 57/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Chia can be grown in Tharaka Nithi County, but the soil scores 57/100 and needs targeted management to reach full potential. At an average pH of 4.99 the soil is strongly acidic, below Chia's preferred 6–8 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 Chia's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Chia, which favours sandy loam. On ShambaIQ's soil-match model, Chia is the #72 soil match of the 106 crops we assess for Tharaka Nithi County. Chia's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Tharaka Nithi's 57/100 suitability a realistic target here is closer to 285 kg/acre (~KES 42,750/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 | Chia needs | Status |
|---|---|---|---|
| pH | 4.99 | 6–8 | Adjust |
| Nitrogen | 1.23 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 19.6 mg/kg | min 12 mg/kg | OK |
| Potassium | 211 mg/kg | min 100 mg/kg | OK |
| Rainfall | 900 mm | 300–800 mm | High |
| Altitude | 1,100 m | 1,000–2,200 m | OK |
Planting calendar for Tharaka Nithi
Long Rains· March–MayMain season here
Short Rains· October–December
Top dressing guide
Tharaka Nithi's nitrogen (1.23 g/kg) already meets Chia's 0.5 g/kg requirement, so this is a maintenance rate.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag