What makes wine kosher?

From the Jerusalem Post: What makes wine kosher? Lots of laws, lots of love.

A two-day kosher wine fair opened in Jerusalem on Wednesday, and the question on many visitors’ lips was: What exactly makes wine kosher?

The wine fair at the Jerusalem International Convention Center (Binyenei Ha’uma) held in a cooperation with Wine and Gourmet magazine provides the perfect opportunity to answer that question.

"Kosher wine starts in the vineyard with the orlah, which means that it is forbidden to use the grapevines from the first three years of the planting, but only from the fourth year," said Aryeh Ganz, the main kashrut supervisor for Carmel, Israel’s largest winery. [continue].