I learned in class that Gibberlic Acid GA3, might be possible to enlarge the...

Asked July 30, 2017, 11:01 AM EDT

I learned in class that Gibberlic Acid GA3, might be possible to enlarge the fruiting body of grapes; I found a product on Amazon, which is pure GA3 Can i apply this directly to the grapes, If so how and how much?

Laramie County Wyoming

3 Responses

There is a very good series of articles on this subject online within eXtension. Here is the link:
http://articles.extension.org/pages/31608/using-gibberellic-acid-to-reduce-cluster-compactness-in-grapes
The article discusses when to apply and how much.
Karen P.

Thank you for the article! I have now small grape clusters, but not mature.
In your processional opinion, would you still apply the GA3?
Thanks again,
Michael Rothwell

I would not apply it now. GA should be applied during bloom, prior to fruit set.
Karen P.