Growing Macadamia in Nairobi

Soil suitability analysis based on Nairobi's nutrient profile

Nairobi County is a solid choice for Macadamia, with a soil-match score of 71/100. At an average pH of 6.85 the soil sits above Macadamia's preferred 4.5–6.5 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (1.1 g/kg), phosphorus (22.1 mg/kg) and potassium (236 mg/kg) all meet Macadamia's requirements, so a maintenance fertilizer programme is enough. The county's predominantly clay loam soils suit Macadamia, which favours loam. Macadamia's full potential is about 1,800 kg/acre (~KES 198,000/acre at KES 110/kg), but at Nairobi's 71/100 suitability a realistic target here is closer to 1,598 kg/acre (~KES 175,780/acre) unless the constraints above are addressed.

71Suitability score

Soil & climate match

FactorNairobi soilMacadamia needsStatus
pH6.854.56.5Adjust
Nitrogen1.1 g/kgmin 0.8 g/kgOK
Phosphorus22.1 mg/kgmin 12 mg/kgOK
Potassium236 mg/kgmin 150 mg/kgOK
Rainfall900 mm700–1,500 mmOK
Altitude1,700 m900–2,100 mOK

Top dressing guide

Product
CAN
Timing
Start of rains (biannual)
Instruction
Apply in ring around drip line. Young trees need less.
Bags per Acre
0.5

Recommended seed varieties

KRG 15Medium/Highland
KALRO · 1000-1500 days · 2.7–4.5 tons/acre
High nut recovery; suited to central highlands.
Embu 1Medium/Highland
KALRO · 1000-1500 days · 2.3–4.0 tons/acre
Good kernel quality; moderate yield.
EMB-3Medium/Highland
KALRO-Thika · 1400-1550 days · 3.1–5.0 tons/acre
High first-grade nut ratio; good kernel recovery; KEPHIS certified; suited to Central Kenya highlands.

Economics

Market priceKES 110/kg
Expected yield in Nairobi1,598 kg/acre
Estimated revenueKES 175,780/acre
Adjusted for Nairobi's 71/100 suitability. Under ideal conditions Macadamia can reach 1,800 kg/acre (~KES 198,000/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(4,500)
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