Cabernet: Custom-made for a change
In Europe, Cabernet Sauvignon is considered King of wines. In Australia it seems to sit in the shadow of Shiraz. But a greater understanding of the varietal by producers and key changes in the weather signal an exciting future for this regal wine.
Of all the great wine regions in the world, it is Bordeaux that commands the most respect. Home to esteemed names such as Château Montrose, Château Latour, Château Lafite Rothschild, the wines of Bordeaux have a sense of royalty about them. It is here where Cabernet reigns supreme – dark and brooding with flavours ranging from chocolate, cigar box and tobacco, its broad tannin structure allows it to age far more than any other wine. It is the stuff legend.
In Australia, the thick-skinned grape varietal has been planted in virtually every wine region across Australia, however, it doesn’t always produce the goods. It struggles when it’s too cold and gets too jammy when it is too hot.
Naturally, regions whose climes resemble the maritime climate of Bordeaux, with its warm days and cool nights, produce our best. Traditionally, that has been Coonawarra in South Australia and, more recently, the Western Australian wine regions of Margaret River and Great Southern.
Certainly, these were the regions that shone in our Cabernet tasting with more than half the wines in the Top 30 produced in these three regions. “The potential to make world class Cabernet from Margaret River and the Great Southern is amazing and it’s only just getting started,” says Richard Burch from Howard Park, whose Abercrombie Cabernet Sauvignon 2012 topped the tasting. “Western Australia is a relatively young wine region with vines only planted in the 1970s. But when you put together the benign weather and growing conditions, the gradual accumulation of vine age, and the continuing discovery of the best individual sites for Cabernet in Western Australia, the future looks exciting.”
The Bordeaux of South Australia
Before Western Australia came onto the wine scene, it was Coonawarra that held the mantle as Australia’s premier Cabernet region. For many, it still is. Remarkably similar to Bordeaux in its maritime climate, the region’s famous terra rossa soils were thought to be a hindrance to producing great Cabernet, but as Paul Gordon, senior winemaker at Leconfield points out, it has imparted Cabernet from this region with a unique flavour profile and the climate allows for consistently good vintages.
“That strip of terra rossa soil that sits thinly over limestone. The red soil, high in clay content, provides moisture-holding capacity to sustain the vines over the dry summer months while the porous limestone allows access to high quality water several metres below the surface, says Paul.
“The cold Antarctic waters unique to South East South Australia cool the night summer breezes, ameliorating the warmth of the day to produce a long growing season. In cooler years, the conditions allow for ripening through April and early May and produce fine, elegant styles of great longevity. In warmer seasons, harvest may occur in mid to late March and fuller styles result – but always the emphasis is on patience to allow the flavours and tannins to ripen.”
Care for the canopy
As this tasting shows, Coonawarra is not the only South Australia region to produce quality Cabernet. McLaren Vale, Langhorne Creek, Eden Valley, Barossa Valley and Clare Valley can produce wines with strong varietal characters. “There is very strong potential to make great Cabernet in Clare,” says Sevenhill winemaker Liz Heidenreich.
“Cabernet vines thrive on the cool nights and warm days we see in the Clare ripening period. The best wines come from years when the crop level is not too high, the canopies are full and healthy, allowing grapes to ripen for longer into the season, and when we have long, even summers.
Paul Smith, winemaker at Wirra Wirra in McLaren Vale, also believes canopy management is paramount in the production of great Cabernet, while also highlighting the importance of winemaking nous.
“The vine canopy has to provide dappled light to the fruit, the window of picking for beautiful fragrant Cabernet is short, while handling through ferment and oak selection will expose some winemakers,” says Paul.
While experience has shown Paul that canopy management is important in producing great Cabernet, science is backing up the theory. One of the primary characters of Cabernet Sauvignon is the presence of herbaceous green flavours, particularly when the wine is young. Researchers have found the presence of methoxypyrazine (more commonly called pyrazine) is responsible. It is the compound that gives Cabernet aromas of capsicum, eucalypt and mint. It has been discovered that pyrazine can be altered through attentive vineyard management. By careful pruning of the leafy part of the vines, viticulturists can manage what sort of aromas result in the wine.
While work in the vineyard is becoming increasingly important, winemakers have softened the somewhat off-putting green, stalky flavours of Cabernet simply by allowing the wine to mature. Most of the wines in this tasting have some age, with some of the stars being from vintages such as 2010 and 2012.
A Key Change
One of the surprising findings from this tasting was that cooler wine regions such as the Yarra Valley, Adelaide Hills and even the Hilltops have been able to produce top shelf Cabernet. “The Yarra Valley has a proven track record of producing high quality Cabernet, lets not forget names like Mount Mary, Yarra Yering and Yeringberg,” says Ben Portet from Dominque Portet Wines in the Yarra Valley.
“In saying that, the potential to make even greater, and more importantly, more consistent Cabernet is strong, especially with the increase in our growing season average temperature and in turn our drier climatic conditions.” Vic Peos from Peos Estate in the cool climate region of Manjimup of Western Australia also agrees that climate change has had a positive effect on the potential for cooler regions such as his to produce great Cabernet. “The last decade the weather has really changed, the last six years, apart from 2010, have been spectacular for producing Cabernet,” says Vic. “We still have the cold nights and early rainfall in late winter and early spring, so the canopy is lush and the berry is great. But during the summer, it is not as wet anymore, so we can really hang our Cabernet a lot longer on the vines, and we can get skin and tannin ripeness. We are thinking that Cabernet can be one of our real stars. The future is exciting.”