Answer: Your blue salvia is considered half-hardy, so if the roots were protected from a hard winter freeze, they are likely to naturalize in the garden. The tubers are similar to dahlia tubers and can be treated as such; dig and store in the fall, then replant in the spring. Or, if the bed is well draining and protected from a deep freeze, you can leave the tuberous roots right in the ground. I'd leave the tubers in the ground - you'll be rewarded with healthy new plants in a few weeks.
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