Answer: There are several possible explanations for this. One is that they are planted too deeply and the winter moisture causes them to "drown". Another possibility is that they are not watered enough in the fall and therefore dehydrate and die over the winter. Another possibility is that the variety you planted is not winter hardy in your area, since this can vary. You mightt want to consult with your county extension as to the cause (there could also be a pest or disease problem at work) and how to avoid repeating the problem. I am very sorry about all your plants!
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