Growing Tangerine in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Quick answer

Generally not ideal — Garissa is poorly suited to Tangerine. Garissa's soil (pH 7.96, alkaline) gives Tangerine a suitability score of 11/100. Match fertilizer to Garissa's nitrogen and phosphorus levels for the best result.

Garissa County is a challenging environment for Tangerine (soil-match score 11/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Tangerine's preferred 6–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.61 g/kg, P 37.7 mg/kg, K 407 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. Tangerine prefers loam soils, while Garissa is largely sandy, so drainage and organic-matter management matter more here. Garissa receives approximately 250 mm/year — well below Tangerine's minimum of 600 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Tangerine is the #43 soil match of the 106 crops we assess for Garissa County. Tangerine's full potential is about 10,000 kg/acre (~KES 600,000/acre at KES 60/kg), but at Garissa's 11/100 suitability a realistic target here is closer to 1,375 kg/acre (~KES 82,500/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.

11Suitability score

Soil & climate match

FactorGarissa soilTangerine needsStatus
pH7.9667.5Adjust
Nitrogen0.61 g/kgmin 1.2 g/kgLow
Phosphorus37.7 mg/kgmin 20 mg/kgOK
Potassium407 mg/kgmin 200 mg/kgOK
Rainfall250 mm600–1,200 mmLow
Altitude200 m0–2,100 mOK

Planting calendar for Garissa

Long Rains· MarchMay

March
Transplanting & Basal
April
Pruning & Top Dressing
May
Flowering & Fruit Set

Short Rains· OctoberDecemberMain season here

October
Transplanting & Basal
November
Pruning & Top Dressing
December
Fruit Development

Top dressing guide

Product
CAN
Timing
Three times per year
Instruction
Split feeding around the drip line; foliar zinc for leaf and fruit quality.
Bags per acre in Garissa
10.6

Garissa's nitrogen (0.61 g/kg) is 51% of the 1.2 g/kg Tangerine needs, so the standard 0.6 bags/acre is raised to 1. Split it across two applications to limit leaching.

Economics

Market priceKES 60/kg
Expected yield in Garissa1,375 kg/acre
Estimated revenueKES 82,500/acre
Adjusted for Garissa's 11/100 suitability. Under ideal conditions Tangerine can reach 10,000 kg/acre (~KES 600,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureLoam

Fertilizer prices

DAP
KES 3,500(6,500)
CAN
KES 2,875(5,700)
NPK 17:17:17
KES 3,275(5,600)
Urea
KES 3,500(5,500)
Lime
KES 1,500(1,800)

Green = subsidized · (Commercial) per 50kg bag