Late spring overnight frosts in Germany’s wine-growing regions have raised concerns among winemakers about potential impacts on the harvest. The German Winegrowers’ Association (DWV) fears that the cold temperatures could damage wine yields this year: “The frosts at this point in time are so devastating because the vegetation is already well advanced after the recent months of record heat,” DWV President Klaus Schneider told the Funke Mediengruppe newspaper chain on Friday. “The young, fertile shoots are now freezing, and those that grow back may not be fertile,” he said. That means that wineg…