Grapes stay fresh longer on vine or off?

Question:Does anyone know if grapes will stay fresh longer if refrigerated and kept on the vine or plucked off the vine? Not special grapes just regular red grapes from the grocery store.

Answers:
I've kept all kinds of grapes in the fridge in their store [plastic] bags for up to 2 weeks--still on their stems, but I culled out the squishy old ones every time I clipped off a bunch to eat. Get rid of the dead or moldy ones as you go along, and what's left will keep just fine. Don't wash them until you're ready to eat the ones you snip off. If you select good firm & spiffy ones in the bags from the store, you should have about a 95% survival rate from fridge storage. Bon appetit!