Thanks, ltilton! This vine has two challenges, 1) Keeping it in bounds, 2) Glassy-winged Sharpshooters. I walk the vine in the morning for both, and as often as I can for #2. Last year I was finger smashing at least 10 GWS per pass. Has me concerned about Pierce's Disease. Here's some fruitset:

The summer ripening among these hold about a month. Then the taste usually starts going bad. Crimson seedless holds just as well on the vine in the greenhouse as in the frig. The greenhouse after Nov 1 is pretty cool as that is chill cycle. I just ate a few more Jupiter. They'd be better to me if I spit out the skins. The skin is pretty nasty. Don't know if I'll even keep this one. Summer Muscat has vastly superior flavor for my taste and they appear to ripen about the same time. Another thing about Jupiter is it leafed out and bloomed well before the others. That would be way too soon outside here. Muscat of Alexandria leafed out well after all the others, at least a month after Jupiter. It would be a good candidate for an outside grape. Those berries are just swelling and starting to color. I hope it tastes as good as Summer Muscat but it is seeded.

Plant-one-on-me, I'll comment about winter survival of potted material in Michigan. Because of our climate, an exposed pot will have soil about 2 to 3 zones colder than an in-ground plant will experience. In essence, the only things which will survive in an exposed, above ground pot are things hardy to about Zone 3, which grapes, alas, are not. So, you have a couple of options -- overwintering someplace sheltered like a marginally heated garage, burying the pot into the soil for the winter and mulching, or putting the pot into a sheltered corner and insulating deeply around it with something like bales of straw and leaves, or trenching the entire pot in a deep trench covered with heavy mulch and soil. I've wintered a number of semi-tropicals including figs, windmill, needle, and Sabal palms, pomegranites, etc., by the trench method. The plants always wintered beautifully for me EXCEPT for vole damage, which could be severe no matter how much poison bait I buried with the plants, so I just gave up on that and now winter them in my attached garage which gets just enough heat from the house to stay above freezing. There are alternatives though, for your soild situation -- a slightly raised bed with some dry wells or drainage trenches around it would help. Most American grapes like Concord are, in my personal experience, pretty immune to some minor flooding -- mine are in heavy clay in a low part of my yard which floods for a day or two at snowmelt and during high rainfall, and they've never objected, in fact, the thrive, and they've been in this spot since Nixon was President. Sorry to hijack your thread, Fruitnut, I too would like to hear a lot more about your greenhouse culture -- how big is it, do you heat it, what type of containers do you use, and mostly, WHY are you doing greenhouse culture as oppossed to outdoor culture? I've been reading your posts for many months, starting back in the winter/spring when you talked about some of the trees blooming, and I too would love to pick your brains about this. Dennis SE Michigan

Yeah, AR is a beautiful grape but not very flavorful. I've tried them at the local farmer's markets for a couple of years and the flavor was just never there. I planted crimson seedless per your recommendation and was glad I did. CS is a real winner.