Normal
It seems impossible for me to keep the grape in fresh condition for so long. In addition, once thawed, the grapes will lose half of their beneficial properties. If you defrost it safely (in the refrigerator or quickly under cold running water), it will be safe to eat. But as in many sources is mentioned, the quality will decline. You will find the grapes goes mushy and impossible to consume. Every year, I make wine from fresh grapes and use it specifically for cooking: red wine pot roast, glazed t-bone with red wine and mushrooms, slow-roasted chicken, etc.
