The Bowyer Ridge site sits at what Rosback describes as a sweet spot – a north-facing slope where elevation, aspect and soil converge in a way that is neither too cold nor too warm, holding acidity long into the ripening season while still achieving full flavour development. “Compared to warmer Hills sites, we hold acidity longer,” he says, “and compared to higher, colder sites, we still get flavour. It’s a vineyard that rewards patience – the wines don’t shout, but they stay with you.” The soils are as varied as the topography: shallow ironstone sections produce firmer, more mineral fruit, while areas of deeper red loam yield a richer, more generous character. Surrounding native scrub woodland moderates wind and temperature, supports biodiversity and stabilises conditions across the blocks. “The soil type at Bowyer Ridge is deep red loam with mica schist and ironstone,” says Rosback, “lending a distinctive mineral nuance to the wines. Our chardonnay, influenced by the high-altitude site, shows a distinctive driven style – power with elegance and finesse, and beautiful natural acidity.”
“The soil type at Bowyer Ridge is deep red loam with mica schist and ironstone, lending a distinctive mineral nuance to the wines. Our chardonnay, the main variety at Bowyer Ridge, influenced by the high-altitude site, shows a distinctive driven style, power with elegance and finesse, and beautiful natural acidity.”
For Rosback, the work connecting vineyard to glass has been an ongoing dialogue with the site rather than a program imposed on it. “We’ve done plenty of informal trials with the winemaking team where we tweak one thing in the vineyard and taste it back later – canopy density, crop load, harvest timing,” he says. “The biggest difference we see is texture. When the vines are balanced, the wines don’t just taste better, they feel better in the mouth – more shape, more length, less noise.” The stylistic choices are made early, well before harvest. “A lot of the style is locked in well before the fruit is picked,” Rosback says. “If we want tension and line, we manage the canopy to shade fruit and slow things down. If we want generosity, we let a bit more light in. You can’t fix that stuff in the winery. You’re really just revealing what the vineyard has already decided.”
The pivot in his thinking came gradually. “My real ‘aha’ moment was realising that more effort doesn’t mean better outcomes,” says Rosback. “When we stopped over-managing and started responding to what the vines were telling us, everything improved – vine health, fruit quality, and ultimately the wines.” That responsiveness now runs through every aspect of how the vineyard is managed. Soil health is built through six years of biological inputs – mycorrhizal fungi, beneficial bacteria, humic acid, kelp products, fulvic acid and bio-humates – alongside cover crops and a perennial sward. Herbicide use has been progressively reduced through under-vine cover crops and low-rate applications. The result is visible first in the soil and then in the fruit. “We see it in the soils – more structure, more life, better water holding,” Rosback says. “Then you see it in the vines: steadier growth, less stress, more even ripening. By the time the fruit hits the winery, it’s already calm, already balanced.”
Innovation is woven into Bowyer Ridge’s DNA, and several of the technologies developed by Rosback and his team to solve specific on-farm problems have since become commercial ventures. MaxiCut – specialist hydraulic vine shears capable of removing old cordons and wires in seconds – was developed to improve the efficiency of converting the vineyard from spur to cane pruning and to control eutypa, and won the 2017 Bentleys SA Grape Growing Wine Industry IMPACT Award. Built on the same platform, the Vine Claw attachment to the property’s skid steer mechanically removes vine debris after the cutting is done. The Cudlee Creek bushfire of 2020 burned through sections of Bowyer Ridge, scorching vine trunks and destroying many posts. Rosback’s response was to adapt the skid steer again – developing the Bull Ant over a few days, an attachment that removes burnt post stumps in seconds, leaving a clean hole for a new post to be slipped into. Any usable timber from that process is recycled into fencing elsewhere on the property.
Labour management is the other front on which Bowyer Ridge has developed its own technology. “Hand labour is the biggest expense of the vineyard, especially with picking and pruning for premium production,” Rosback says. “Cost-effective labour management and quality control is a challenge facing all of us as growers.” The solution is Taglog – a real-time operating platform using RFID technology and field scanners to record job progress and efficiency remotely. It won the 2019 Wine Industry IMPACT Start-Up Award.
Sustainability at Bowyer Ridge is understood in the round. “For us, sustainability means the vineyard has to work ecologically, economically and socially,” says Rosback. “There’s no point doing the right thing environmentally if the business isn’t viable or the people are burnt out. A sustainable vineyard is one that can still be here, producing great fruit, in 50 years.” The landscape beyond the vine rows is part of that thinking too – shelter belts, native vegetation, water movement – with roughly 50 per cent of the broader estate retained as native vegetation and wildlife corridors. “When the land is healthier overall, the vines just seem to fall into line.”
What drives all of it, in the end, is something Rosback articulates quietly. He still loves watching visitors taste the wine before they’ve seen the vineyard, then taking them up the hill. “You can see the penny drop,” he says. “Suddenly the flavours make sense. That moment of connection between place and glass never gets old.” The ambition now is to keep refining the precision with which that connection is expressed. “I’d love to keep refining block-by-block management, treating every part of the vineyard on its own terms rather than averaging it out,” he says. “The more site-specific we get, the more honest the wines become.”
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