Geography and Climate
The German wine regions are some of the most northerly in the world. The main wine-producing climate lies below the 50th parallel, which runs through the regions Rheingau and Mosel. Above this line the climate becomes less conducive to wine production, but there are still some vineyards above this line.
Because of the northerly climate, there has been a search for suitable grape varieties (particularly frost resistant and early harvesting ones), and many crosses have been developed, such as Müller-Thurgau in the Geisenheim Grape Breeding Institute. Recently there has been an increase in plantings of Riesling as local and international demand has been demanding high quality wines.
The wines are all produced around rivers, mainly the Rhine and its tributaries, often sheltered by mountains. The rivers have significant microclimate effects to moderate the temperature. The soil is slate in the steep valleys, to absorb the sun's heat and retain it overnight. On the rolling hills the soil is lime and clay dominated. The great sites are often extremely steep so they catch the most sunlight, but they are difficult to harvest mechanically. The slopes are also positioned facing the south or south-west to angle towards the sun.
The vineyards are extremely small compared to new world vineyards. This makes the lists of wines produced long and complex, and many wines hard to obtain as production is so limited.
Read more about this topic: German Wine
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