Grapes - Knowledgebase Question

Antelop, CA
Avatar for klefevre8
Question by klefevre8
March 18, 1998
I have a Thompson seedless red grape vine, 6 years old, trained onto a trellis. When the time comes to harvest them, some will ripen to the point that they begin to rot while others in the same bunch are still green. The vine is watered by a sprinkler head, twice a day, 4 days a week.

What can I do to obtain a more even ripening of the grapes (since half are still green, it seems a waste to pick them when only some are ripe).


Answer from NGA
March 18, 1998
You'll have larger, more fully ripened grapes if you'll thin the clusters to just one per shoot. That way the vine can concentrate its energy into ripening fewer clusters, resulting in larger, better tasting fruit. Some vigorous vines can handle two clusters per shoot. Remove the clusters prior to bloom. Give it a try this spring, I'm sure you'll reap the rewards when harvest time comes!

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