Growing Lemongrass in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Quick answer

Generally not ideal — Isiolo is poorly suited to Lemongrass. Isiolo's soil (pH 7.83, alkaline) gives Lemongrass a suitability score of 15/100. Match fertilizer to Isiolo's nitrogen and phosphorus levels for the best result.

Isiolo County is a challenging environment for Lemongrass (soil-match score 15/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Lemongrass's preferred 5.5–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.46 g/kg, P 37.4 mg/kg, K 395 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Lemongrass prefers loam soils, while Isiolo is largely sandy, so drainage and organic-matter management matter more here. Isiolo receives approximately 350 mm/year — well below Lemongrass's minimum of 700 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Lemongrass is the #66 soil match of the 106 crops we assess for Isiolo County. Lemongrass's full potential is about 8,000 kg/acre (~KES 480,000/acre at KES 60/kg), but at Isiolo's 15/100 suitability a realistic target here is closer to 1,500 kg/acre (~KES 90,000/acre) unless the constraints above are addressed.

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

15Suitability score

Soil & climate match

FactorIsiolo soilLemongrass needsStatus
pH7.835.57.5Adjust
Nitrogen0.46 g/kgmin 0.8 g/kgLow
Phosphorus37.4 mg/kgmin 12 mg/kgOK
Potassium395 mg/kgmin 150 mg/kgOK
Rainfall350 mm700–1,800 mmLow
Altitude900 m0–2,000 mOK

Planting calendar for Isiolo

Long Rains· MarchMay

March
Slip Planting & Basal
April
Weeding & Top Dressing
May
First Cutting

Short Rains· OctoberDecemberMain season here

October
Slip Planting & Basal
November
Weeding & Top Dressing
December
First Cutting

Top dressing guide

Product
CAN
Timing
Every 2 months
Instruction
Ratoon crop — top-dress each cutting cycle for continuous biomass.
Bags per acre in Isiolo
0.50.4

Isiolo's nitrogen (0.46 g/kg) is 57% of the 0.8 g/kg Lemongrass needs, so the standard 0.4 bags/acre is raised to 0.5. Split it across two applications to limit leaching.

Economics

Market priceKES 60/kg
Expected yield in Isiolo1,500 kg/acre
Estimated revenueKES 90,000/acre
Adjusted for Isiolo's 15/100 suitability. Under ideal conditions Lemongrass can reach 8,000 kg/acre (~KES 480,000/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