Cut the vine back to the trunk or even to the ground. That will force old buds buried in the wood and you can re-train the structure of the vine with the new shoots. You may lose one season's crop, but that's all.
-Lon Rombough
On Apr 12, 2010, at 2:02 PM, William C. Garthright wrote:
I've got a few grapes in the backyard, all doing well, but I've got a
problem with pruning one of my Concord grapevines. It's about five years
old, and I've struggled to get it pruned correctly every year. Well,
none of my grapes look like the pruning diagrams, but they seem to work
OK, and I get tons of grapes.
But this one ended up with two thick canes, one to the left and one to
the right, but lower than I wanted (about 4' high). I thought that,
eventually, something would sprout on or near the trunk, but instead, I
get these long, long canes sprouting out near the ends, and nothing on
or even near the trunk. So far, I've managed fine, but this year, it's
just ridiculous. There aren't any young canes or buds anywhere near the
trunk. The best I could do would be some elaborate loop-de-loop to keep
long canes in the space I've got for them.
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