As the head of a winery, I am very frequently asked about terroir. Does the concept really exist? Is it real? Of course it is, I answer, but it’s difficult to understand. But, it has actually helped me to define myself ...

Some of the wines that display Long Island’s true nature-terroir if you will-are actually red blends, not the varietal merlots that are often lauded as the region’s best. I know, shocking. I should be st...