Petaluma is committed to producing the very best wines from South Australia's most distinguished viticultural areas. Coonawarra in the South East of South Australia is the premier region for red varietals. Cooled by the cold waters of the near Petaluma is committed to producing the very best wines from South Australia's most distinguished viticultural areas. Coonawarra in the South East of South Australia is the premier region for red varietals. Cooled by the cold waters of the nearby Southern Ocean along with the famed terra rossa soils of the area, this provides wonderful growing conditions for Shirazby Southern Ocean along with the famed terra rossa soils of the area, this provides wonderful growing conditions for Shiraz