How big an arbour? Well as big as you can provide. This thing could cover a small house. I've never seen the fruit in my climate but I have read that it is unpalatable. It's mainly grown for autumn colour here.

Well nevermind then, not growing this plant then.

No, 15'x15' will not work. I know of one nearby that is at least 40' up a Doug fir and spreads horizontally into smaller growing trees on either size. This is a monster vine!! Also very hard to harvest any grapes due to size/height of vine......the birds will get to them long before you can. And they do not taste good anyway....this is really grown only for ornamental purposes.

Yup. No way in heck am I planting this monster in my yard. Don't want a single plant taking over my whole garden

Actually I am reconsidering growing this vine. If 15x15 is too small would a 20x20 ft arbor/pergola work then?

If you are prepared to train and trim for ever you could grow it. As Gardengal said above 40 feet is not unusual. Also any structure would need to extremely robust.

40 ft. up a tree is one being allowed to take off. As with other climbers in defined spaces pruning and training is used to keep these within bounds. 15 x 15 ft. seems perfectly do-able to me, if you undertake and continue the required maintenance that would be involved. Just as with wine grapes this species can be pruned back significantly every year and still work out. I know of a planting of some age that is kept flat against a wood fence of normal height, with it forming a covering only over the upper half.* The horizontal spread is maybe 15 ft. or so, if that. So the surface area occupied by the leafy portion of the top(s) is about 2 ft x 15 ft (height x width).

*Just as with fanning out other kinds of plants against a surface, it would look better if all of the fence was covered

Yes thats what I mean. I will be hard cutting it in early spring so that the vine is only 2 feet above ground. I'm not going to just leave it and let it grow wildly lol. Maybe I might even get a tall ladder, get a pole saw/lopper and prune off all growth that exceeds 30 ft too.. if thats possible.

Of course you can do anything you want but the best feature of this plant is its tall expanse of vines covered in those very large leaves in all their fall finery. I am not sure I understand the point of growing a big, vibrant woody plant only to cut it back almost to the ground each year. Seems like an excessive amount of effort for a minimal return.

But grapes used for eating purposes and winery are cut back hard and they still look fine appearance wise so I don't see why this one won't? And because it has large leaves, wouldn't it still look nice and dense even if the vine itself is smaller? I'm willing to do all that work if I can grow this beautiful grape vine! I choose this plant because I like wild plants better in general than cultivated ones like many of the edible and winery grapes. Also its autumn color will be striking and its from Japan too

Grapes in vineyards don't look very decorative and certainly don't each cover a 15 x 15 area. You don't need to prune this vine to the ground. That defeats the object of covering the trellis. They leaf out relatively late and it will not look 'nice and dense' until well into the growing season. You'd need to maintain a permanent area and then train and prune new growth regularly to keep it to its space.

Since you are so determined and don't seem convinced by the answers you're getting why don't you just get one and try it? They're not expensive. Btw referring to it as a 'grape vine' is a bit misleading. Don't expect a usable harvest off it.

You know what you are totally right... I didn't realize that. They're not particularly grown for harvest so why cut them down to the ground right. I am thinking of trying out this vine soon. Maybe next week planting or if too late then next spring. Which is better? Also, I am thinking of letting it grow on my 3 eastern red cedars instead of an arbor. My 3 easter redcedars are about 4 feet apart and over 30 feet tall. The middle one is about 45-50 feet. Is it a good idea to grow it on trees? I see a lot of other vines like boston ivy and english ivy growing on large trees around here.

I would not grow it on a tree unless you don't care about the tree. It has very large leaves densely held. It would shade out parts of the trees.

So I decided not to grow them on my juniper trees since I don't want to kill it. But now I want to know whether this vine can grow on a fence like this below? At my workplace I see many grapes growing on fences like this.

Grapes and really most any other vines will work well supported by a chain link fence. I would not try this with wisteria, but pretty much anything else can be grown this way. Just allow enough room for the vine to spread.

YES finally I found a way to grow this vine without taking so much space in the garden. It says 60 ft according to Missouribotanicalgarden so I should have the fence about that long? One thing I'm worried though.. Is that this giant will eventually make the fence collapse due to its weight. Will that ever happen on a chain link fence?

At my workplace in the woods, I saw a vine that had a trunk diameter at least 2 ft. I hope that wasn't a grape? and I sure hope vitis coignetiae doesn't get that monstrous..

It shouldn't. Climbing hydrangeas are grown on chain link fences all the time and they likely weigh even more than the grape. And you can always prune the grape as needed to keep the size in check. Other grape species will achieve the same size or close to it but are routinely pruned to keep smaller for ease of maintenance and to increase fruit production. The grape won't mind at all!!

Thanks. I want to try growing planting this grape secretly at my workplace next spring on a chain link fence on the other side of our property which is in the woods full of locust trees and tree of heavens and other grape vines. Do you know if that is illegal or not? I want to test it out