I have wild grapes --- or at least, I think they're wild. It's possible they're cultivated varieties planted a long time ago. I would really like to encourage them to produce. I did get some grapes last year on one stock. But I'm unsure what to do. The grapes were entirely tangled up and overgrown with other plants when I first moved out here. It took me a good year, but I got them cleared of multiflora, that bull briar stuff, polk, all kinds of grasses, poison ivy and who knows what else. This spring, I cut all of them back severely (I have three places with old stocks -- at least, I think that's what you call the big main roots) and they've taken off gangbusters. But what do I do now? Do I keep snipping off the ends? Should I fertilize them? Or ... ? I've also planted some domestic varieties in the yard, if that makes any difference --- although I suspect it doesn't.