Neighbouring the Dolenjska winegrowing area, Bizeljsko-Sremič lies on the left (northern) bank of the Sava River. The soils here are a product of Miocene sediment decay mixed with materials eroded from neighbouring mountains. Rogaška Slatina is a famous spa in the area, with sources of thermal and mineral water, again a reminder of a lively geological past.
The climate is gentle since the area presents its mountainous "back" to the cold winds of the north. The south and southwest facing slopes along the Sava valley are considered to be the best viticultural sites of all Posavje.
Modra Frankinja reaches its best in this area - the phenomenal 1983 vintage is archived in the Orešje Castle, which houses the area's largest cellar. The best white wines are Sauvignon, Chardonnay, and Laški Rizling. The area grows a unique white vine, the autochthonous Rumeni Plavec, which ferments into an acid-rich wine used primarily for blending. This grape is grown in quantity only in the Bizeljsko-Sremič area and can not be found outside the Posavje region.
The area produces some characteristic blended wines: Bizeljčan is an aromatic, dry blend of Laški Rizling, Sauvignon, Rumeni Plavec, and Šipon; white Sremičan is a dry blend of Laški Rizling, Sauvignon, and Rumeni Plavec; red Sremičan is a dry red wine blended from Modra Frankinja, Žametna Črnina, and Laški Rizling - a somewhat rare combination since blending of red wines with white wines is quite uncommon in Slovenia.
Specialties of this area include white, rosé, and red sparkling wines produced in accordance with the Methode Champenoise and Tawny Port.
