Answer: Unfortunately, based on your description I am unable to make much of a guess as to what is wrong with your grape vine. However, it is possible that the variety you are trying to grow is only marginally hardy in your area, or that there is a pest or disease problem which is limiting production or that there is a cultural problem such as inadequate fertility or less than full sunlight all day. You might wish to consult with your County Extension (684-3001) as to the best types of grapes to grow in your area as well for information about the suggested spray routine for grapes in you area. This will vary depending on the variety of grape, local weather and the frequency of specific pests and diseases in your area. Finally, you might also wish to run some basic soil tests and your County Extension should be able to help you with those and interpreting the results. I hope this helps you get some grapes next year!
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