Hi, I planted some grape vines last summer, one produced super sweet and spicy grapes (Buffalo, I allowed only one cluster to form). But the leaves started to show discoloration toward the end of august, similar to that picutre: http://www.viticultuream.ca/images/grappe_louise_Sw.jpg. Do you think it could be a disease or could it be a normal dis-coloration? I wonder if I should take it out, so it doesn’t spread on my other vines (Adalmiina and Somerset).
If it’s that late in the yr rough looking leaves are pretty normal. Don’t take out the plant. Just watch it next yr. If issues show up prior to mid summer then try to figure out what’s going on.
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