Answer: You can plant it in the ground but it will need to be dug and stored for the winter. Wait until frost kills the top. Then cut it back, dig it up, rinse it off, air dry for several days. Be careful not to cut or bruise the rhizome when you are digging. Pack in dry shavings or similar material in a cardboard box or paper bag. Store in a dry dark area at about 50 degrees. Check periodically to make sure it is not rotting (too damp or too cold) or shriveling (too warm).
If you grow it in a container, allow to be frosted, then trim it back and bring it indoors to store in a dark cool place (50 degrees). Do not water it while it is stored. In the spring you will need to repot it into a larger container. Personally I prefer to store them bare because it takes less space.
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