I'm a little perplexed on pruining grape vines in late winter, so let me tell you what I have this growing season, and I'd appreciate any suggestions. I use the four cane kniffin system. Currently, each of my four canes are, I think, one year old and brown in color. From these canes are brand new shoots, some which have already grown a couple of feet in length. These new shoots also have some new grapes on them.
This winter, will I remove the brown cane I'm now seeing and use one of these new shoots (currently green) to replace it? Or, will I continue to use this brown cane? If I am to remove this brown cane, should I allow one of these new shoots to grow the length of my wire this season?
I keep reading that grapes grow on the shoots from one year old canes. Does this mean that they won't grow from shoots on two, three, four year old canes? Thanks.