Grk, the indigenous grape from Dalmatian island Korčula is, along with Pošip, the most potent local white grape variety. It grows only around Lumbarda, a small town at the southern end of island Korčula. Some think that it was brought to Korčula by the ancient Greeks around 500 BC, while others believe that it was named for the pleasant tart finish of the wine (grk is the Croatian for tart or bitter). The harvest yield is very variable because the flowers are functionally all feminine and their fertilization is irregular: to encourage fertilization, some other grape variety which blossoms at the same time is always grown nearby. In Lumbarda that is usually Plavac Mali. Frano Milina Bire is the only winemaker who has ecologically grown vineyard of this grape.