There are four principal soil types. Hard mottled yellow duplex soils with a very distinct break marked by a thin, acid cement/sand pan between the surface soil and the underlying friable, well-drained clay are to be found in the Dromana area. Around Red Hill and Main Ridge, red soils of volcanic origin (kraznozems) predominate; these are very deep and fertile. In the Merricks area there are brown duplex soils, while much sandier soils are in evidence at Moorooduc.
Chardonnay: This is the Mornington Peninsula's most noteworthy wine and one that, if made in the style favoured by most producers, is distinctively different to any other Chardonnay produced in Australia. The background fruit flavour is quite delicate, with flavours in the melon, citrus, fig spectrum. It is very sensitive to the influence of winemaking technique and, in particular, to the effect of malolactic fermentation. Partly through necessity, as natural acid levels are frequently quite high, and partly, it would seem, through peer group pressures, the majority of the wines are wholly or partially taken through the secondary malolactic fermentation and frequently barrel fermented. The net result is to overlay a strong nutty/cashew character. If sufficient underlying fruit is there, and it often is, the result is spectacularly good and equally distinctive.
Pinot Gris and Viognier: Viognier has been in the district for decades, while Pinot Gris is a more recent arrival. Pinot Gris has become a bistro favorite and somewhat of a regional signature wine in recent years.
Cabernet Sauvignon: Despite an early enthusiasm for this variety, it became apparent that much of the region is too cold for the satisfactory ripening of Cabernet Sauvignon. However, in warmer areas of lower elevation, especially around Moorooduc, Cabernet Sauvignon and its Bordeaux cousins, Cabernet Franc and Merlot, ripen extremely well. Many regional Cabernets are in fact blended with up to 15% Merlot and Cabernet Franc, a practice which accentuates the natural tendency to suppleness and elegance. The flavours can be intense if not downright piercing, running the full gamut of red into black berries, but the wines are never heavy and certainly not tannic.
Pinot Noir: There is enormous range, depth and style to the region's Pinot Noirs, from hauntingly delicate to intense and lingering. The constant factor is the clear varietal character. As the majority is at the lighter end of the spectrum, that varietal clarity is all the more pronounced. Such wines are best enjoyed within two or three years of vintage and are a fine advertisement for the variety.
Source: The official Wine Australia website.