Growing Radish in Samburu

Soil suitability analysis based on Samburu's nutrient profile

Quick answer

Generally not ideal — Samburu is poorly suited to Radish. Samburu's soil (pH 8.28, alkaline) gives Radish a suitability score of 29/100. Match fertilizer to Samburu's nitrogen and phosphorus levels for the best result.

Samburu County is a challenging environment for Radish (soil-match score 29/100) and will need significant amendment before planting. At an average pH of 8.28 the soil sits above Radish's preferred 6–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.67 g/kg, P 42.1 mg/kg, K 387 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Radish, which favours sandy loam. Samburu receives approximately 350 mm/year — well below Radish's minimum of 500 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Radish is the #26 soil match of the 106 crops we assess for Samburu County. Radish's full potential is about 8,000 kg/acre (~KES 320,000/acre at KES 40/kg), but at Samburu's 29/100 suitability a realistic target here is closer to 2,900 kg/acre (~KES 116,000/acre) unless the constraints above are addressed.

Better matched to Samburu's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.

29Suitability score

Soil & climate match

FactorSamburu soilRadish needsStatus
pH8.2867.5Adjust
Nitrogen0.67 g/kgmin 0.8 g/kgLow
Phosphorus42.1 mg/kgmin 12 mg/kgOK
Potassium387 mg/kgmin 150 mg/kgOK
Rainfall350 mm500–1,000 mmLow
Altitude900 m500–2,500 mOK

Planting calendar for Samburu

Long Rains· MarchMay

March
Direct Sowing & Basal
April
Thinning & Top Dressing
May
Harvest

Short Rains· OctoberDecemberMain season here

October
Direct Sowing & Basal
November
Thinning
December
Harvest

Top dressing guide

Product
CAN
Timing
Week 2
Instruction
Fast crop — one light top-dress is enough. Excess nitrogen grows leaf not root.
Bags per acre in Samburu
0.250.2

Samburu's nitrogen (0.67 g/kg) is 84% of the 0.8 g/kg Radish needs, so the standard 0.2 bags/acre is raised to 0.25. Split it across two applications to limit leaching.

Economics

Market priceKES 40/kg
Expected yield in Samburu2,900 kg/acre
Estimated revenueKES 116,000/acre
Adjusted for Samburu's 29/100 suitability. Under ideal conditions Radish can reach 8,000 kg/acre (~KES 320,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureSandy Loam

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