Answer: Salvia should do well in your area and as a group, salvias tend to be mostly pest and disease free. They do need a well drained soil that is not overly rich, so it might be possible that they are somehow being overwatered and thus suffer root damage. Since your others are doing well I suspect it may be something unique to the specific variety you are growing -- there are many different salvias. I would suggest you consult with your local county extension to try to diagnose the problem and based on knowing that, decide how to proceed. I'm sorry I can't be more specific for you.
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