Growing Chia in Tana River
Soil suitability analysis based on Tana River's nutrient profile
Generally not ideal — Tana River is poorly suited to Chia. Tana River's soil (pH 6.4, slightly acidic) gives Chia a suitability score of 3/100. Match fertilizer to Tana River's nitrogen and phosphorus levels for the best result.
Tana River County is a challenging environment for Chia (soil-match score 3/100) and will need significant amendment before planting. Local soils average pH 6.4 — slightly acidic to near-neutral and inside the 6–8 band Chia prefers, so no lime is usually required. The main gap is phosphorus — measured at N 1.04 g/kg, P 8.5 mg/kg, K 108 mg/kg against this crop's low/medium/low demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Chia, which favours sandy loam. At 200 m, the county sits below Chia's preferred altitude range (1000–2200 m), which limits yield potential due to heat stress. On ShambaIQ's soil-match model, Chia is the #74 soil match of the 106 crops we assess for Tana River County. Chia's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Tana River's 3/100 suitability a realistic target here is closer to 15 kg/acre (~KES 2,250/acre) unless the constraints above are addressed.
Better matched to Tana River's soil: Sorghum, Cowpeas, and Pigeon Peas — each scores higher on the same soil.
Soil & climate match
| Factor | Tana River soil | Chia needs | Status |
|---|---|---|---|
| pH | 6.4 | 6–8 | OK |
| Nitrogen | 1.04 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 8.5 mg/kg | min 12 mg/kg | Low |
| Potassium | 108 mg/kg | min 100 mg/kg | OK |
| Rainfall | 400 mm | 300–800 mm | OK |
| Altitude | 200 m | 1,000–2,200 m | Low |
Planting calendar for Tana River
Long Rains· March–May
Short Rains· October–DecemberMain season here
Top dressing guide
Tana River's nitrogen (1.04 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