I think my Niagara-based colleagues here at the NYCR would agree that their home region has yet to hone in on a ‘signature variety.’ Many grapes have been consistent performers, including chardonnay, pinot noir and cabernet franc. Does Niagara need a signature variety? I have mixed feelings on the matter, but will explore them in an upcoming post. For now, we can say that it can be helpful to be known primarily for one grape — think Oregon (pinot noir) or the Finger Lakes (riesling) closer to home. On the other hand, merlot as Long Island’s signature variety has been…