I did a lousy job pruning my grapes last spring. These are wine-like grapes and not table grapes. I only have 4 plants. They went crazy this past summer with branches all over the ground and the wires that I have strung up. I pruned them way back over the winter and trained only a couple of branches for each one up to the wires. I am noticing, though, that there is a lot of "sucker" growth on the main branches coming up from the ground. I think I need to prune those off so that the energy goes to the top and not along the trunk. I just wanted to confirm.