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Soil
The topography of the Yarra Valley varies enormously and so the region encompasses a wide range of soil types.
The soils in the middle section of the Yarra Valley are ancient, mountain-derived sandy clay loams interspersed with broken sandstone.
The other soil type is much younger in origin and is a highly friable, brilliantly coloured red volcanic soil found in both the Upper and Lower Yarra Valley.
Climate
The Yarra Valley is cool in relation to the rest of Australia's viticultural regions. The region is cooler than Bordeaux but warmer than Burgundy. Elevation varies from 50m – 400m.
Rainfall is winter/spring dominant, with the summer relatively cool, dry and humid. There is limited maritime influence. The small diurnal temperature range reflects the proximity of the sea.
Harvest typically commences in early March with Pinot Noir and finishes with Cabernet Sauvignon in early May. These dates correspond to September and November respectively in the northern hemisphere. Frost is rarely a problem, but can affect the lower vineyards on the valley floor from time to time.
With a seven month growing season, rainfall of between 750-950mm (often less rather than more) and restricted water holding capacity in some soils, irrigation is considered essential - although the extent of its use does vary significantly between producers. |
