Growing Macadamia in Nyandarua

Soil suitability analysis based on Nyandarua's nutrient profile

Quick answer

Yes — Nyandarua is well suited to Macadamia. Nyandarua's soil (pH 5.38, strongly acidic) gives Macadamia a suitability score of 77/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Nyandarua County is well suited to Macadamia, scoring 77/100 on ShambaIQ's soil-match model. Local soils average pH 5.38 — moderately acidic and inside the 4.5–6.5 band Macadamia prefers, so no lime is usually required. Nitrogen (1.28 g/kg), phosphorus (14 mg/kg) and potassium (166 mg/kg) all meet Macadamia's requirements, so a maintenance fertilizer programme is enough. Macadamia prefers loam soils, while Nyandarua is largely clay, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Macadamia is the #12 soil match of the 106 crops we assess for Nyandarua County. At current prices (about KES 110/kg) and a typical 1,800 kg/acre yield, a well-managed Macadamia crop here can gross roughly KES 198,000 per acre.

77Suitability score

Soil & climate match

FactorNyandarua soilMacadamia needsStatus
pH5.384.5–6.5OK
Nitrogen1.28 g/kgmin 0.8 g/kgOK
Phosphorus14 mg/kgmin 12 mg/kgOK
Potassium166 mg/kgmin 150 mg/kgOK
Rainfall1,100 mm700–1,500 mmOK
Altitude2,300 m900–2,100 mHigh

Planting calendar for Nyandarua

Long Rains· March–MayMain season here

March
Fertilizer (NPK) & Weed Control
April
Flower & Nut-set Monitoring
May
Stink Bug Scouting & Pruning

Short Rains· October–December

October
Nut Development & Top Dressing
November
Pest Control (nut borer)
December
Harvest Mature Nut Fall

Dry Season· January–March

January
Harvest & Dehusking
February
Irrigation & Mulching
March
Formative & Sanitation Pruning

Top dressing guide

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

Nyandarua's nitrogen (1.28 g/kg) already meets Macadamia's 0.8 g/kg requirement, so this is a maintenance rate.

Seed varieties for Nyandarua

3 macadamia varieties are rated for Nyandarua's altitude (2,300 m) and rainfall (1,100 mm):

KRG 15· Medium/HighlandEmbu 1· Medium/HighlandEMB-3· Medium/Highland
Full variety details — maturity, yield & breeder →

Economics

Market priceKES 110/kg
Expected yield in Nyandarua1,733 kg/acre
Estimated revenueKES 190,630/acre
Adjusted for Nyandarua's 77/100 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(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