OT? Choosing a vine for shade, not fruit

As I understand it, most "root stock" grafting varieties are male vines that don't produce fruit but are extremely healthy and vinuous.

Sounds like there is a possibility here, but I do not know if I understand completely. Most grape vines, if grafted to "other" root stock are done for the fruit, yes? Not to be argumentative - I want to believe. More important, where do I find this animal(s)?

Stephen Levine writes "I live in Eastern Long Island. I have an overhead trellis that I want to have filled with greenery.....Are there any sterile grapes out there that might do exactly what I am looking for? I do like the grape vine greenery."

Stephen - I like ernie's idea of growing hops. They are vigorous growers and are quite interesting, perhaps a good topic for discussion when you have guests. If your heart is set on grapes plant any type you want and prune the blooms off every spring. You will have to do some pruning anyway and it's just one of those spring chores grape growers live with. About two months away from pruning my vineyard...hard to believe it will ever get warm again with snow on the ground and temps. below freezing.

Bill Frazier Olathe, Kansas

Some grape varieties, including many vinifera, do not produce from basal buds on each shoot. If this is the case for your variety, then all you have to do is prune back to the basal buds and you will have foliage but no fruit.