With a history dating back to the 1920s, the region's largest winegrowing cooperative (known in Slovene as the Kmečka Zadruga Krško) was founded in its present form in 1993, and produces some 1.5 million litres of wine each year from grapes supplied by over 300 local vineyards. While our personal favourite of the eight types of wine offered is the Modra Frankinja aged in barrique oak barrels from France, one stands head and shoulders above the rest: Cviček, which accounts for over 90% of the annual production. This is no surprise given that the cooperative was one of the driving forces behind a successful campaign to have Cviček protected by an official government recognised labelling system, which has meant that since 2002 only wine produced south of the Sava river in the Dolenjska region can be called Cviček. Located opposite Šrajbarski Turn Castle in the hills above Krško and Leskovec, the modern production facilities are partially housed in the castle's former wine cellar, and is open for both tours and tastings.