Viognier is the aromatic white behind one of Australian wine’s signature techniques — the little splash of white grape co-fermented into red Shiraz. On its own it is a rich, low-acid, intensely perfumed wine; in a red blend it performs a quiet piece of chemistry that transforms the wine it joins.
The grape of Condrieu
Viognier is the sole permitted grape of Condrieu, in the northern Rhône, and that is its spiritual home. Varietal Viognier is full-bodied and low in acidity, with pronounced aromas of apricot, white peach, honeysuckle and orange blossom — opulent and floral rather than crisp. It is also a genuinely difficult grape: it needs a long, warm season to develop those aromatics, but not so much heat that sugar and alcohol race ahead before the perfume arrives, and its ideal harvest window is narrow. Picked too early it is neutral; too late, flabby and alcoholic. Grown so little by the 1960s that Condrieu nearly vanished, it has since spread worldwide.
The co-fermentation trick
Viognier’s most famous role is not as a white wine at all. In the northern Rhône’s Côte-Rôtie, growers have long co-fermented a small proportion of Viognier — usually five per cent or less — with red Syrah. The effect is real chemistry: through co-pigmentation, the white grape’s compounds bind with the red’s anthocyanins and stabilise and deepen the colour, while adding a lift of apricot-and-floral perfume to the aromatics. Because Viognier ripens earlier than Syrah, it is picked separately and added to the red must during fermentation.
This is the technique that defines Australian cool-climate Shiraz at its most fragrant. Clonakilla built its landmark Shiraz Viognier directly on the Côte-Rôtie model, and Yarra Yering has made its Dry Red No. 2 in the same manner for decades — both proof that a few per cent of the right white grape can change a red wine’s character entirely.
Viognier in Australia
As a varietal, Viognier found an Australian champion in Yalumba, which planted the first commercial New World Viognier in the Eden Valley in 1980 and remains the country’s largest producer — bottling it both as a rich, apricot-scented white and as the co-ferment partner in its Shiraz. Between the varietal wines and the Shiraz-Viognier reds it enables, Viognier occupies a small but distinctive niche in Australian wine: rarely a headliner, but capable of a transformation out of all proportion to how little of it is used.