QuestionI live in California near San Francisco. A few months ago my dad and I planted 3 grape vines in the ground, with full sun. This consisted of 2 Thompson Seedless and one other kind that we aren't sure of. One of the 2 Thompson Seedless stopped growing and the leaves at and near the top have curled up, somewhat shriveled. The other 2 vines are fine. I was searching for possible diseases, and the closest one I could find was Eutypa Dieback. But in that, the leaves turn yellow. Our leaves are still green. I know its normal for grape leaves to start curly and then flatten out, but these are curlier than normal, and aren't really flattening.
AnswerIf the grape still has normal green color and is not wilting, I would not do anything. Most plants go through a transplant shock when moved from a pot to the ground. The plant needs time to adjust and produce roots adequate to support the top growth. If the environmental conditions have gone from cool and wet to hot and dry I would say this is the problem. Make sure the vine is watered adequately during dry periods and if there is a lot of new top growth, you may consider pruning it back just a bit. I would not suspect a disease at this point. Check the undersides of the leaves for aphids and other insects that may be causing the curling. I hope some of thes suggestions lead you to be able to fix the problem. Good Luck.