Place sauerkraut in a Ziplock bag or any container appropriate for freezing, and leave 2 inches of space at the top. When the sauerkraut freezes, it will expand, taking up additional room in the freezer.
If using a freezer bag, be sure that you squeeze out additional air before you seal it. To prevent the development of freezer burn, you may layer the freezer bags that you use. Many will triple-layered them for added protection.
If you use a freezer bag, lay it flat down and put the date and content information on it once you have sealed it. When placed in the freezer, be sure to lay it flat down not to take up a lot of space.
It is best to freeze in a deep freezer. This is because sauerkraut freezes best at 0°F or less. Once you are ready to use the sauerkraut, defrost it in the refrigerator.
You may store your sauerkraut safely for anywhere from 8 months to 12 months.