The Carso appears as a Denominazione di Origine Controllata and its two most important varieties of vines are the Malvasia Istriana and the Terrano. The first type was most probably imported from Greece and it was already yielding good results as early as the 14th century. The Terrano, on the other hand, is believed to be native to Istria. In the district, the wine made from its grapes is referred to as "sangue del Carso" because of its extremely intense red color, which is one of its distinguishing features.
The Carso’s climate is quite special, for extremely mild periods are followed by bouts of weather that are as hard and violent as the land itself.