Yesterday morning everything was still okay. But in the early evening I noticed that the leaves of my grape vine aren't doing very well. The leaves are hanging as if they don't have enough water, but I give it water every day. Okay it was a very hot day (~40°C/110F). I have added a lot of water to besure it's not this, but nothing. This morning I woke up and still the same. Does anyone have an idea what this can be? And how to treat it?
