What's up with these grapes?

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Smohrman

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Anyone know why this would happen to grapes? I believe they’re getting plenty of water. Thx in advance!

106466792_10219073797928570_6368954982381646908_n.jpg107376159_10219073797568561_7704801537522396458_n.jpg
 

ibglowin

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Are they getting enough water and nutrients? I see your in the same neck of the woods as @NorCal. Perhaps he can chime in here.
 

salcoco

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I think it is shatter also. a heavy rain when cluster is flowering will cause problems with pollination and subsequently cluster develop as yours.
 

NorCal

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The first words out of my mouth was shatter as well. How’s the canopy cover? Are the grapes exposed to the afternoon sun?
 

Smohrman

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The first words out of my mouth was shatter as well. How’s the canopy cover? Are the grapes exposed to the afternoon sun?
Well I planted them under the partial shade of a tree- so yes they have partial access to the afternoon sun. They get partial/dappled sunlight from the morning to noon/1 o'clock, and fairly direct sunlight from 1-ish until sundown.
 

Smohrman

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I think it is shatter also. a heavy rain when cluster is flowering will cause problems with pollination and subsequently cluster develop as yours.
Thank you! Currently looking into Shatter- it's a busy weekend though!
 

NorCal

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Do you know if the gaps between the grapes have always been there or were they small grapes that raisened and fell off?
 

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