Green Farms Nut Company (GFNC), South Africa’s leading macadamia processor and marketer, has returned from a two-week technical exchange in Australia with market-shaping insights for the global macadamia industry.

Led by Group Agricultural Technical Manager Barry Christie and KZN Technical Manager Dr. Armand Smit, the visit included GFNC’s long-term processing partner Suncoast Gold in Gympie, leading orchards in Bundaberg and New South Wales; and sessions with prominent consultants Dr. Chris Searle and Dr. Theunis Smit, both widely respected technical voices in Australia’s macadamia sector.

“This was more than a fact-finding mission; it was about identifying competitive advantages, understanding where South Africa already leads, and where adopting Australian practices could deliver higher profitability,” said Barry Christie, GFNC Group Agricultural Technical Manager.

Processing leadership reinforced

The tour began with a visit to Suncoast Gold, providing valuable insights into international processing approaches. “It was heartening to see how our own South African factories continue to uphold global best practices,” Christie said.

“It underscores to both growers and customers that GFNC’s processing quality is second to none.” This leadership is central to GFNC’s strategy of securing premium global markets while building long-term grower trust.

Orchard scale and efficiency

In Bundaberg, the team observed one of Australia’s most ambitious new macadamia developments: a 1,400-hectare farm planted with only two varieties at ultra-dense 6x3m spacing. Designed entirely around mechanical harvesting, the orchard reflects Australia’s priority to cut labor costs.

Tree skirting, rock removal, and runway-flat orchard floors allow mechanical harvesters to move at speed. “It was remarkable to see orchards prepared to that level of precision,” said Christie, who test-drove the flatness himself!

While such density would raise concerns in South Africa, the model demonstrates how variety selection, mechanization and pruning strategies can align to achieve efficiency at scale.

Soil health: a critical differentiator

Australian orchards face an unavoidable trade-off: mechanical harvesting damages the soil surface – the area where macadamia feeder roots typically grow. To counteract this, growers aerate the top 10cm annually, incorporating lime and organic matter to maintain fertility.

By contrast, South African orchards, largely hand-harvested, retain natural mulch and organic matter, leaving soils more resilient.

“This is a clear area where South Africa holds a competitive advantage,” Christie noted. “Healthy soils underpin long-term yield and orchard resilience, and this is a strength we must protect. With that said, Australian growers are doing exceptionally well within their limitations.”

The visit also highlighted mechanical pruning practices designed to increase root systems, build stem thickness (to increase carbohydrate storage capacity), lessons that could be adapted locally to improve orchard resilience.

Pioneering research potential

One of the most surprising observations was the almost complete absence of diseased or nutrient-deficient trees across vast Australian orchards. Christie believes this may point to soil microbial interactions unique to the region.

“This unexpected finding could open an entirely new area of research. If soil microbes are playing a role in macadamia tree health, understanding and applying this knowledge could be transformational for growers worldwide,” he said.

A203 thick trunks, 5-year-old tree.

Industry evolution and knowledge exchange

Beyond orchards, Christie and Smit engaged with veteran grower Ian McConachie, whose lifelong work has focused on conserving wild macadamia trees, now an endangered species in their natural environment. The heritage visits underscored the fragility of the crop’s origins, while reinforcing the importance of commercialization for species survival.

In New South Wales, by contrast, Christie described orchards in decline, with overgrown and unmanaged farms reflecting a cycle of underinvestment, a cautionary note on the consequences of missed reinvestment in orchard renewal.

South Africa’s position: stronger, but evolving

The GFNC team returned confident that South Africa remains well positioned globally, yet with clear opportunities for improvement.

“We came back convinced that the South African model is stronger overall, particularly in soil health and orchard sustainability. But there are innovations in Australia, from breeding and understanding environment-cultivar interactions, pruning and planting density, that could be applied here to drive profitability. The real opportunity lies in reciprocal learning, not competition,” Christie concluded.