Growing Chia in Mombasa
Soil suitability analysis based on Mombasa's nutrient profile
Generally not ideal — Mombasa is poorly suited to Chia. Mombasa's soil (pH 6.24, slightly acidic) gives Chia a suitability score of 0/100. Match fertilizer to Mombasa's nitrogen and phosphorus levels for the best result.
Mombasa County is a challenging environment for Chia (soil-match score 0/100) and will need significant amendment before planting. Local soils average pH 6.24 — 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 0.95 g/kg, P 8.4 mg/kg, K 136 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 50 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 #105 soil match of the 106 crops we assess for Mombasa County. Chia's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Mombasa's 0/100 suitability a realistic target here is closer to 0 kg/acre (~KES 0/acre) unless the constraints above are addressed.
Better matched to Mombasa's soil: Finger Millet, Cashew Nuts, and Napier Grass — each scores higher on the same soil.
Soil & climate match
| Factor | Mombasa soil | Chia needs | Status |
|---|---|---|---|
| pH | 6.24 | 6–8 | OK |
| Nitrogen | 0.95 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 8.4 mg/kg | min 12 mg/kg | Low |
| Potassium | 136 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,000 mm | 300–800 mm | High |
| Altitude | 50 m | 1,000–2,200 m | Low |
Planting calendar for Mombasa
Long Rains· April–JuneMain season here
Short Rains· November–January
Top dressing guide
Mombasa's nitrogen (0.95 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