The comparatively small wine region Mittelrhein is among the warmest in Germany. The thermometer rises above 25 °C (77 °F) for up to 50 days in the vineyards on this 120 kilometre stretch along the Rhine River. The VDP.GROSSE LAGE® and VDP.ERSTE LAGE® vineyards located between Oberdiebach und Spay are all on the left side of the Rhine and face south. The vineyards are extremely steep and terraced and demand hard labour. Slate and greywacke dominate the soils.