What characteristic aspect do the best vineyard sites in Germany have?

The best vineyard sites in Germany are characterized by a southerly aspect. This orientation is crucial because it maximizes sunlight exposure for the grapevines, which is essential for the growing process, particularly in a climate that can be cooler, such as Germany's. A southerly aspect ensures that the vineyards receive ample sunlight throughout the day, helping to promote photosynthesis and the ripening of the grapes.

Moreover, a southerly exposure can also provide some protection from harsh winds and the cold, enabling the vines to develop more fully. This is especially important for the late-ripening grape varieties commonly found in Germany, such as Riesling, which thrive in well-sunned environments.

In addition, this orientation can facilitate good drainage, as it often allows cold air to flow downwards, while warmer air can linger around the vines, further promoting optimal growing conditions. Thus, when establishing vineyard sites, the southerly aspect is a significant factor contributing to the quality of the wine produced.