Answer: I tend to agree with the person at the garden center - over or underwatering can cause real distress in plants. On the other hand, roses usually lose their leaves in the winter, so the problem might not be a problem, at all! Roses never really go dormant in Southern California as they do in other parts of the nation, but you'll need to prepare your rose for a winter rest by removing all of the leaves. Just pull them off and dispose of them. Wait until mid-January, then prune back the stems (especially those that look withered or off-color). New buds should form on the stems and new flowering stems should begin to grow in the spring.
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