On Saturday, Steve Shaw of Shaw Vineyard spent about an hour carefully cutting buds from canes he pulled from his vineyard. It had been several days since the coldest weather to hit the region in years had finally lifted. Reports varied from county to county, town to town, vineyard to vineyard. The lowest temperatures had plunged perilously close to ten degrees below zero. Shaw wanted to know how his canes had dealt with it. There is no hard line of temperature that will inevitably cause vine death, but ten below is an unofficial rule of thumb. Growers will say that ten below for three hours…