I have a small garden in my balcony where I am trying my best to grow fruits and flowers. I am very much a novice and learning every day. I recently bought a grafted grape plant. I repotted it. It was thriving and grew up to 4 feet in height with healthy leaves. Then suddenly the leaves started turning white and dry-looking around the edges, eventually turning brown. Now they are falling off. The plant has become bare at the bottom. It continues to grow at the top. But new leaves are also getting affected. There are no pests, some grape pearls only. I have tried suggestions from various groups, scoured the net. But nothing seems to be helping. I have attached some pictures. Please help.