America's favorite red wine passion, Merlot is known for its role, sometimes as the primary varietal, in the great wines of Bordeaux. It is, by nature, an earlier maturing grape than Cabernet Sauvignon, and tends to have rounder, plummier, more forward fruit with lower tannins so it is often used to soften and round out the edges of the more astringent Cabernet. It is the grape of choice in Pomerol and St. Emilion, and represents the basis for some of America's most popular red wines, particularly from Washington, Napa Valley, Sonoma Country, the Central Coast, Long Island, Texas, and yes, Colorado.
The vast region of South Australia is home to a wide variety of vineyards, growing a large range of different grape varietals. Because the South Australian wine region is so large, it benefits from a great array of climatic conditions – from dry and hot, to cool and windy – which wineries can use to their advantage when it comes to selecting the grape varietal they wish to thrive in a particular sub-region. South Australia is most commonly associated with the big, powerful and fruit-forward Shiraz wines which are produced in the cooler valley areas of the region, but recent decades have seen something of an explosion in the South Australian wine industry, leading to wineries expanding their repertoire enormously and experimenting with other fine grape varietals and making the most of their unique terroir.