berrycrush Senior Member Joined Jul 17, 2013 Messages 560 Reaction score 119 Jun 16, 2019 #1 What causes this color change? sunburn? infection? It only happens to this Concord vine on every one of its clusters.
What causes this color change? sunburn? infection? It only happens to this Concord vine on every one of its clusters.
salcoco Veteran Wine Maker Supporting Member Joined Jan 1, 2007 Messages 3,219 Reaction score 1,652 Location Kansas Jun 17, 2019 #2 it looks like sunburn. I would only be concerned if the grapes start to shrivel. in future ensure that at least one leaf covers the cluster. it is kind of a balance between not shading to insure ripening and shading to insure intact clusters.
it looks like sunburn. I would only be concerned if the grapes start to shrivel. in future ensure that at least one leaf covers the cluster. it is kind of a balance between not shading to insure ripening and shading to insure intact clusters.