The journey from a macadamia as it leaves the orchard to a graded kernel ready for packing is one of the most demanding in the nut trade. Macadamias have the hardest shell of any commercial nut and an oil content high enough to make careful handling essential. The processing and sorting steps between harvest and dispatch are what turn a raw agricultural crop into a product that meets a buyer's specification — and where in-house capability makes a measurable difference to quality and consistency.
Harvest and initial handling
Macadamias are harvested as they fall, gathered from orchard floors over a season that runs through the South African autumn and winter. At this stage the nut sits inside a fibrous green husk. Speed matters: nuts left too long on the ground risk moisture uptake, mould, and quality loss. Prompt collection and movement to the processing facility protects the crop before any value-adding step begins.
Dehusking
The first processing step is dehusking — removing the outer green husk to leave the nut-in-shell. Done promptly after harvest, dehusking prevents the husk from trapping moisture against the shell and allows drying to begin. Husk is separated and the nut-in-shell moves forward for drying.
Drying
Drying is the single most important step for macadamia quality and shelf life. Because the kernel is rich in oil, excess moisture leads to rancidity and spoilage. Nut-in-shell is dried in stages, gradually bringing moisture down to a target level that stabilises the kernel for storage and onward processing. Controlled, staged drying — rather than rushing the process — protects colour and flavour and is fundamental to the kernel quality a buyer ultimately receives. Nut-in-shell that meets specification can be dispatched at this point to buyers who crack in their own market; nut destined for kernel supply moves on to cracking.
Cracking
Cracking the exceptionally hard macadamia shell to release the kernel intact is a precision step. The aim is to maximise the proportion of whole and half kernels, since these command the highest value, while minimising fragmentation. After cracking, shell and kernel are separated, and the shell — a dense, useful by-product — is removed from the stream.
Sorting and grading
With kernels released, sorting and grading determine the final product specification. This is where a lot is resolved into defined styles and quality grades.
Size and style sorting separates kernels into wholes, halves, and pieces, often with size ranges within each. This allows a buyer to receive a consistent, defined style rather than a mixed lot.
Colour sorting grades kernels by colour, with lighter, more uniform kernels attracting a premium. Optical and manual sorting remove off-colour and discoloured kernels.
Defect removal takes out immature kernels, damaged pieces, and any foreign material, bringing the lot within the defect tolerances agreed in the specification.
The result is a graded kernel — sorted by style, size, colour, and quality — that matches what the buyer contracted for, rather than a generic bulk product.
Quality assurance and certification
Throughout processing, food-safety and quality controls govern each step. HACCP-based systems, alongside Halaal and Kosher certifications where required, give buyers documented assurance that the controls behind the stated grade are in place. Moisture, colour, and defect parameters can be certified against the agreed specification before dispatch.
Why in-house processing matters
When processing and sorting sit in-house rather than being outsourced, a supplier controls the variables that determine quality — drying schedules, cracking yield, and sorting precision — and can supply kernels to a defined specification rather than reselling whatever a third party produces. For the buyer, that means greater consistency lot to lot, the ability to specify grade and quality factors with confidence, and a single point of accountability for the finished product.
Talk to us about specification
Pasha International processes and sorts South African macadamias in-house, supplying nut-in-shell and graded kernels across the full range of styles and quality grades. To discuss a specification or request pricing against a defined grade, get in touch with our team.
For pricing, specifications or a trading discussion, our team responds to all enquiries within one business day.