The traditional winery is located in the municipality of Bernkastel-Wehlen in the German wine-growing region of Mosel and has been family-owned for centuries. The Klosterberg house is located in the middle of the Wehlen vineyards. Using modern as well as historical materials, the estate building was extensively renovated between 2009 and 2012. The winery was taken over by Markus Molitor in 1984 at the age of 20 and has since been run by the eighth generation of the family. The vineyards cover 60 hectares of vines in around 20 different individual sites. These include Treppchen (Erden), Graben and Lay (Bernkastel), Klostergarten and Mandelgraben (Brauneberg), Bockstein (Ockfen), Rausch (Saarburg), Domprobst and Himmelreich (Graach), Schlossberg (Traben), Würzgarten (Ürzig), Abtei, Klosterberg and Sonnenuhr (Wehlen), and Himmelreich, Schlossberg and Sonnenuhr (Zeltingen). They are predominantly planted with Riesling (94%), as well as smaller amounts of Pinot Noir and Pinot Blanc. The vineyards of the Zeltinger Sonnenuhr are also home to vines that are over 100 years old.
The vineyards, which are up to 80% steep, are cultivated using quality-enhancing measures such as a balanced leaf-fruit ratio. The soils are enriched exclusively organically. Depending on the location, plot, planting density and vintage, the yield is an extremely low 10 to 55 hl/ha. Due to a very late and selective harvest, only physiologically ripe and healthy grapes are processed. The flavour of the wines is determined by the colour of the capsules: dry in white, off-dry in grey-green as well as fruity and noble sweet in gold. After gentle pressing, the must ferments for months until the next spring. This is done spontaneously in the old vaulted cellars using only natural yeasts, partly in steel tanks and partly in traditional barrels, depending on the type of wine required. The wines then mature for several months on the fine lees. The great site wines are fermented and matured in large (1000 l, 2000 l, 3000 l) wooden barrels made of high-quality, air-dried oak. No fining agents, enzymes or other additives are used. Worth mentioning is the 2010 maturation of a Weißburgunder Wehlener Klosterberg in a whisky barrel. The winery is a member of the Bernkasteler Ring winegrowers' association.
