Growing Chia in Garissa
Soil suitability analysis based on Garissa's nutrient profile
Generally not ideal — Garissa is poorly suited to Chia. Garissa's soil (pH 7.96, alkaline) gives Chia a suitability score of 2/100. Match fertilizer to Garissa's nitrogen and phosphorus levels for the best result.
Garissa County is a challenging environment for Chia (soil-match score 2/100) and will need significant amendment before planting. Local soils average pH 7.96 — alkaline and inside the 6–8 band Chia prefers, so no lime is usually required. Nitrogen (0.61 g/kg), phosphorus (37.7 mg/kg) and potassium (407 mg/kg) all meet Chia's requirements, so a maintenance fertilizer programme is enough. 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 #66 soil match of the 106 crops we assess for Garissa County. Chia's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Garissa's 2/100 suitability a realistic target here is closer to 10 kg/acre (~KES 1,500/acre) unless the constraints above are addressed.
Better matched to Garissa's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.
Soil & climate match
| Factor | Garissa soil | Chia needs | Status |
|---|---|---|---|
| pH | 7.96 | 6–8 | OK |
| Nitrogen | 0.61 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 37.7 mg/kg | min 12 mg/kg | OK |
| Potassium | 407 mg/kg | min 100 mg/kg | OK |
| Rainfall | 250 mm | 300–800 mm | Low |
| Altitude | 200 m | 1,000–2,200 m | Low |
Planting calendar for Garissa
Long Rains· March–May
Short Rains· October–DecemberMain season here
Top dressing guide
Garissa's nitrogen (0.61 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