Growing Sweet Orange in Kisii
Soil suitability analysis based on Kisii's nutrient profile
Possible but challenging — Kisii is only marginally suited to Sweet Orange. Kisii's soil (pH 5.21, strongly acidic) gives Sweet Orange a suitability score of 50/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Sweet Orange can be grown in Kisii County, but the soil scores 50/100 and needs targeted management to reach full potential. At an average pH of 5.21 the soil is moderately acidic, below Sweet Orange's preferred 6–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is nitrogen, phosphorus, and potassium — measured at N 1.09 g/kg, P 13.1 mg/kg, K 151 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing those deficits. The county's predominantly clay loam soils suit Sweet Orange, which favours loam. On ShambaIQ's soil-match model, Sweet Orange is the #67 soil match of the 106 crops we assess for Kisii County. Sweet Orange's full potential is about 12,000 kg/acre (~KES 600,000/acre at KES 50/kg), but at Kisii's 50/100 suitability a realistic target here is closer to 7,500 kg/acre (~KES 375,000/acre) unless the constraints above are addressed.
Better matched to Kisii's soil: Tea, Macadamia, and Pineapple — each scores higher on the same soil.
Soil & climate match
| Factor | Kisii soil | Sweet Orange needs | Status |
|---|---|---|---|
| pH | 5.21 | 6–7.5 | Adjust |
| Nitrogen | 1.09 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 13.1 mg/kg | min 20 mg/kg | Low |
| Potassium | 151 mg/kg | min 200 mg/kg | Low |
| Rainfall | 1,500 mm | 600–1,200 mm | High |
| Altitude | 1,700 m | 0–2,100 m | OK |
Planting calendar for Kisii
Long Rains· March–MayMain season here
Short Rains· August–October
Top dressing guide
Kisii's nitrogen (1.09 g/kg) is 91% of the 1.2 g/kg Sweet Orange needs, so the standard 0.6 bags/acre is raised to 0.75. Split it across two applications to limit leaching.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag