Growing Kale (Sukuma Wiki) in Murang'a

Soil suitability analysis based on Murang'a's nutrient profile

Quick answer

Yes — Murang'a is well suited to Kale (Sukuma Wiki). Murang'a's soil (pH 5.03, strongly acidic) gives Kale (Sukuma Wiki) a suitability score of 77/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Murang'a County is well suited to Kale (Sukuma Wiki), scoring 77/100 on ShambaIQ's soil-match model. Local soils average pH 5.03 — moderately acidic and inside the 5–7 band Kale (Sukuma Wiki) prefers, so no lime is usually required. Nitrogen (1.2 g/kg), phosphorus (12.2 mg/kg) and potassium (168 mg/kg) all meet Kale (Sukuma Wiki)'s requirements, so a maintenance fertilizer programme is enough. The county's predominantly clay soils suit Kale (Sukuma Wiki), which favours clay loam. On ShambaIQ's soil-match model, Kale (Sukuma Wiki) is the #13 soil match of the 106 crops we assess for Murang'a County. At current prices (about KES 20/kg) and a typical 12,000 kg/acre yield, a well-managed Kale (Sukuma Wiki) crop here can gross roughly KES 240,000 per acre.

77Suitability score

Soil & climate match

FactorMurang'a soilKale (Sukuma Wiki) needsStatus
pH5.035–7OK
Nitrogen1.2 g/kgmin 1.2 g/kgOK
Phosphorus12.2 mg/kgmin 12 mg/kgOK
Potassium168 mg/kgmin 150 mg/kgOK
Rainfall1,200 mm700–1,800 mmOK
Altitude1,500 m500–2,500 mOK

Planting calendar for Murang'a

Long Rains· March–MayMain season here

March
Transplanting & Basal Fertilizer
April
First Harvest & Top Dressing
May
Continuous Harvesting & Top Dressing

Short Rains· October–December

October
Transplanting & Basal Fertilizer
November
Top Dressing & Pest Control
December
Continuous Harvesting

Dry Season· January–March

January
Irrigation & Continuous Harvesting
February
Top Dressing Every 3 Weeks
March
Replanting if stand is old

Top dressing guide

Product
CAN
Timing
Every 3 weeks after first harvest
Instruction
Kale is a heavy feeder. Regular top dressing is critical for continuous harvest.
Bags per acre in Murang'a
0.5

Murang'a's nitrogen (1.2 g/kg) already meets Kale (Sukuma Wiki)'s 1.2 g/kg requirement, so this is a maintenance rate.

Seed varieties for Murang'a

2 kale (sukuma wiki) varieties are rated for Murang'a's altitude (1,500 m) and rainfall (1,200 mm):

Thousand Headed· Medium/HighlandCollard Mfalme F1· Medium/Highland
Full variety details — maturity, yield & breeder →

Economics

Market priceKES 20/kg
Expected yield in Murang'a11,550 kg/acre
Estimated revenueKES 231,000/acre
Adjusted for Murang'a's 77/100 suitability. Under ideal conditions Kale (Sukuma Wiki) can reach 12,000 kg/acre (~KES 240,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureClay 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