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Grape Vines

Q.Why are my grape clusters shriveling and not ripening

Zone Western Washington state | Beverly added on September 2, 2014 | Answered

I had a lot of green grape clusters on the vine, but they have begun shriveling and not ripening. What have I done wrong?

A.Answers to this queston: Add Answer
Answered on September 4, 2014

There are several possible diseases. More information here:
Two diseases found especially in cool, moist weather are botrytis
and downy mildew https://www.gardeningknowhow.com/plant-problems/disease/downy-mildew.htm
You can take some fruit and leaf samples to the county extension service for a positive identification. This link will help you locate the closest one:

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