Boston Bay’s estate vineyard was first planted in 1984, and in the forty-odd years since then has seen only two owners – the Ford family, who had the vision to plant vines in an unusual site in a part of Australia that had no prior viticultural history, and the Allen family, its custodians since 2023 and the owners of the Barristers Block label. “What has preserved these vines is not aggressive management, but consistency,” says Lachlan Allen, who also manages the viticulture at the family’s other properties in Wrattonbully and the Adelaide Hills. “The site has been farmed with a steady hand, minimal disturbance, and an understanding that old vines respond best when they are supported, not forced. We believe that when a vineyard is allowed to ‘hold its own’ – to develop deep roots, adapt to its environment and settle into its place – it builds resilience that carries through decade after decade.” As such, there has been little change to the vineyard’s composition since its founding – some of the riesling vines were grafted over to chardonnay by the Fords, but these were worked back to riesling in 2003, before the Allens acquired the vineyard. “Our focus has been restoring balance in the vineyard and letting the coastal environment do more of the heavy lifting,” says Lachlan, who commenced working with the site at the time of purchase. “The goal is simple: healthier soils, stronger vines, and fruit that shows tension, purity and a clear sense of place.”
While the Allens’ tenure of the site is relatively new, Lachlan’s approach to soil health is already yielding rewards. “Rotating cover crops – rye, clover, vetch – have noticeably improved soil structure and moisture retention,” he says. “Earthworms and visible soil life have increased each year, especially in the riesling block, showing the vineyard floor is recovering from previous compaction.” Under-vine mulching and reduced herbicide use have likewise helped stabilise the soils in the under-vine area. “Better soil structure and a more balanced canopy have reduced the need for irrigation, especially for riesling,” Lachlan says. “Vines hold their leaves longer into the season, indicating improved plant resilience. Sap and tissue testing each season has shown more consistent nutrient balance, meaning fewer corrective inputs. We’re seeing more even ripening across blocks, which tells me the vines are in balance.” While those soils are healthier than ever, he adds, “The sandy loam soils are free draining, so the vines never get too comfortable. That slight stress gives us definition in the wine.”
It’s not just the soils that productively stress the vines here – there’s also the matter of wind. “I always tell people the vineyard gets hammered by wind,” Lachlan says. “You’ll be standing there thinking it’s too tough to grow anything decent – and then you taste the riesling and it’s this fine, pure, elegant wine. That contrast is what makes it special.” Those coastal breezes have an upside, though: the constant wind “keeps disease pressure low and naturally moderates vigour.” While the Allens are proud of its merlot, shiraz, and sauvignon blanc, they see riesling as the vineyard’s true strength: “The ocean moderates everything, and that’s perfect for riesling,” Lachlan says. “Compared to Clare or Eden, which can have more power and structure, ours is more windswept and linear. It’s less about drive through the mid-palate and more about precision. Riesling suits this region because it doesn’t need heavy soils or heat to shine. It thrives on cool nights, airflow and that marginal coastal edge.” As such, he says, “What makes this site special is its exposure – you feel it when you stand there, and you taste it in the glass.”
The riesling viticulture here is designed to work with the strengths of the site. “We’ve done a few simple but telling trials around irrigation and picking windows with the winemaking team,” Lachlan says. “When we eased back water and let the vines work a bit harder, the riesling came in with more natural tension and length. It wasn’t bigger – it was sharper, more precise.” (The fact that all of the vineyard’s fruit is hand-picked certainly doesn’t hurt that precision, either.) The site’s calcareous loams mean that merlot, in Lachlan’s words, “produces smaller berries with good colour and a clean line through the palate,” while “the maritime climate brings a different advantage: tannins ripen gently. Instead of broad, heavy fruit, we see bright plum, herbal lift, and finer, more savoury tannins than you’d expect from a warmer Australian site.” He adds: “The biggest thing we’ve learned is that restraint shows up in the glass. This vineyard rewards restraint – the less we push, the more Boston Bay comes through.” As such, the viticultural road map from here on is all about fine-tuning the approach, rather than major changes or radical remediation: “We’re always refining canopy and irrigation to respond to warmer seasons,” Lachlan says. “Small adjustments make a big difference. I’m interested in continuing to fine-tune picking decisions to really lock in that coastal tension.”
Although the vineyard is conventionally farmed – both irrigation and herbicides are in use, albeit minimally – sustainability is a core focus. “Sustainability for us is long-term thinking,” Lachlan says. “This isn’t about one vintage – it’s about making sure this coastal site is still healthy in decades. If the soil biology is strong, the vines look after themselves. That reduces inputs and makes the whole system more resilient.” Backing off on sprays –aided by the coastal breezes, which keep fungal diseases at bay – has encouraged beneficial insect life, and diversity of cover crops in the mid-rows, as well as native vegetation around the vineyard edge, has broken up the vineyard’s former monoculture, with native birdlife returning to drive down the population of the vineyard pest light brown apple moth. “We see ourselves as custodians of the land, not just grape growers. The vineyard sits within a broader coastal landscape,” he says. “Our role is to steward the land, not manipulate it.”
The Allens also focus on the monetary landscape: “Economic sustainability matters too. If the vineyard can’t stand on its own two feet financially, it won’t survive,” Lachlan says. In line with this thinking, the family has made the difficult decision to restrict fruit yields to effectively nil on the shiraz and cabernet sauvignon vines for the past three years while they plan for the vineyard’s future. While they’re looking forward to shiraz making a return to the varietal mix at Boston Bay, the area currently dedicated to cabernet sauvignon is earmarked to be grubbed up and replanted with riesling and some Mediterranean red varieties. “Those red styles work not only environmentally for Port Lincoln, but also with the food that’s produced in the area,” he says. “We’ve had to be realistic – with our Wrattonbully vineyard capable of producing acclaimed cabernet and shiraz, it’s hard to double down on these varieties at Boston Bay while the market is where it is.”
“If anything here is groundbreaking, it’s the commitment to letting the site lead – and resisting the urge to force the vineyard into something it isn’t,” Lachlan concludes. And while the site’s coastal influences can sometimes be challenging to manage, the vineyard also has its perks. “Having grown up in Wrattonbully, and in the Adelaide Hills, standing in the Boston Bay vineyard with the ocean in the background – that’s hard to beat,” Lachlan says. “It reminds you of why we do it.”
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