In mature grape vines, it’s normal for the outer layer of bark to sometimes crack or peel off, which is a sign that the vine is growing and 鈥渂ursting at the seams,鈥 so to speak. Another cause of bark-peeling is frost damage, but because the problem is occurring now, mid-summer, this seems unlikely. A third possibility could be that your vine is getting too much moisture. Does your vine have a lot of mulch or soil around it’s base? If so, try pushing it back from the stem to allow the base to get more air and less moisture.
In mature grape vines, it’s normal for the outer layer of bark to sometimes crack or peel off, which is a sign that the vine is growing and 鈥渂ursting at the seams,鈥 so to speak. Another cause of bark-peeling is frost damage, but because the problem is occurring now, mid-summer, this seems unlikely. A third possibility could be that your vine is getting too much moisture. Does your vine have a lot of mulch or soil around it’s base? If so, try pushing it back from the stem to allow the base to get more air and less moisture.