Answer: Roses are deciduous in cold climates and would typically lose their foliage in the fall and winter, so I think what you are seeing is probably normal. The Flower Carpet yellow groundcover rose is considerd winter hardy into zone 4. A heavy mulch over the root area should be sufficient to protect it over the winter. I am not certain what you mean by covering it, but the mulch should be adequate, you would not need to cover the entire plant. It should grow back just fine in the spring, grow leaves and bloom again next summer.
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