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Grapes Gone Bad?
Thursday, February 23, 2012    
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Why did my concord grapes not all ripen at the same time?  We lost quite a few due to uneven ripening.
 

Some grape selections are more prone to uneven ripening than others, and concord is one of them.  Many factors can influence this - extremely warm summers, extended periods of cooler temps, lack of fertilization, competition from weeds and other vegetation, improper pruning, bugs, weed killers - these are some of the factors that can play a role.