Since 1986 the family has continuously extended its vineyards, bought into different terroirs, some of them Grands Crus, from sedimentary Oligocene Enchenberg to calcareous Muchelkalk Bollenberg and the rare volcanic Primary Rangen. In fact the Enchenberg has been entirely bought, turning it into a monopole.

The Enchenberg is a hillside located at the entry of the Thann valley above the river Thur. It was formed by moraines from a Quaternary glacier. The steep slopes (40%) have been turned into narrow terraces that are just two rows wide. Planted with Riesling and Pinot Gris, Enchenberg produces very mineral rich wines which gain in strength with 2-3 years of aging.

The Bollenberg is a limestone hill located to the east of Orschwihr with 2 mains slopes: east, with shallow soils (rendzine) and west, towards the village, with deep clay soils. This terroir is famous for its Gewurztraminer, but other grapes as well. The wines are very fruity and show well even when young.

The five Grands Crus each have their own character depending on the type of soil.

In general terms, and before making adjustments for the vintage, going from north to south it can be said that:

The Grand Cru Zinnkoepflé produces strong and very fruity Pinot Gris with a great deal of dried grapes. Gewurztraminers are more delicate and spicy.

The Grand Cru Pfingstberg is limey when young, almost grassy, going on mint, and ginger when aged.

The Grand Cru Kessler produces very elegant and feminine delicate Rieslings.

For centuries the Grand Cru Kitterlé has been known for its powerful and monumental Rieslings.

Last but not least the Grand Cru Rangen, with its unique volcanic soil, produces strong Pinot Gris, almost always at the Vendanges Tardives level, and Riesling that often shares the aroma of dried apricot with Pinot Gris.