Juvenile grape vines?

Juvenile grape vines?

Bonjour tout le monde! Any how, I have a pair of juvenile grape vines. One is a pink seedless "Reliance" that I got at the start of the season this year, it is now about four and a half feet tall, trained to a pole. It has either two or three pencil think vines coming off the main "stump/stick" that's slightly larger in diameter than a pencil( when I baught it early season, it was nothing more than this 12" stick with a couple of swollen eyes which are now my little vines). My other is a very old root stump of some kind of yucky Concord grape. What happened here was we baught this house in October 2003. Spring and summer showed us three HORRIBLY untended concord grape vines. I assumed it was due to this that the yeild has been in a word, shit. Half the bunch is rock hard raisins while the other half is green and sour. They taste pretty crappy and have big old seeds (though tending will never cure this I know that) So what I did was dig up one completely and chucked it, as it was the least healthy. In it's place I put the Reliance when I replaced the crappy makeshift "pergola" made out of all kinds of scrap poles from old fences and what not held together with crappy wire -_- ugh. Safe much? No. So now there is a plain but functional "pergola" made out of black pipe that's pretty solid with metal fittings and NOT fence guage wire. Back on track, the second over grown vine is along side my driveway, I have been slowly cobatting it with yearly prunings, trying to get it into fighting shape. It's getting okay. The third, which was also by the crappy makeshift pergola I dug up, I had the intentions of tossing, and in order to do this had to cut through great fat roots that were going out at least 10 feet out and away into the yard about a foot underground. I cut off ALLLLLLL the vines, etc, so I was left with a pretty ugly stump about a foot tall, 2 inches in diameter with some fat juicy roots. Some how the little frankenstein bastard got it's way back into the ground three days later, (after a bit of a tantrum from someone who doesn't even give a crap about the yard or its contents, sheesh!)after having spent those three days in the compost heap. It is now trained to the other side of my new, functional but lacking aesthetic pergola. It has even out grown my new Reliance, even despite the hack job hair cut, and three days out in the elements, etc. So my concord is now about 5 and a half feet with two pencil thick vines coming off a 2" diameter base vine. Should I protect these guys from the winter elements? They are trained onto poles, but should I wrap them in burlap or something? The wind gets very bitter cold and whips, plus i'm zone 5 central Mass, and we get plenty of snow, etc. Anything you guys would suggest for them? By next year or the year after these main stems with become quite woody and sturdy on their own, but since they are still so green I don't want to lose them. Thanks in advance for any help!
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