When European settlers planted the first vines in South Australia's Barossa Valley in the 1840s, they had no idea they were creating what would become one of the world's most extraordinary viticultural archives. Those vines — mostly Shiraz, some Grenache and Mourvèdre — are still alive. Australia federated in 1901. Some of those vines were already 60 years old when Australia became a country. They are now approaching 180 years.
What makes this extraordinary is that it is almost unique in the world. In Europe, a fungal disease called phylloxera — a microscopic aphid that attacks vine roots — swept through virtually every wine region from the 1860s onward, forcing growers to uproot their vineyards and replant on resistant American rootstocks. Very few European regions escaped. South Australia, thanks to its quarantine history and geographic isolation, was never significantly infested. The original vines survived, on their own roots, continuously producing fruit for over 170 years.
The Barossa's two sub-regions produce very different wines. The valley floor (Barossa Valley GI) is warm and flat, the home of old-vine Shiraz, Grenache, and Mourvèdre — rich, generous, full-bodied wines of considerable power. Eden Valley, rising 400–600 metres into the hills to the east, is dramatically cooler — more like a European climate — and produces the Barossa's most celebrated Riesling as well as more elegant, floral Shiraz.