How long does red cabbage last?
Unopened, it keeps in the cupboard for about 2 days.
This refers to: Fresh red cabbage (whole head).

Shelf life of red cabbage at a glance
| Storage | Unopened | Opened |
|---|---|---|
| Cupboard | 2 days | – |
| Fridge | 2 weeks | – |
| Freezer | 10 months | – |
A whole head in the crisper drawer often lasts longer; cut red cabbage about a week. Jarred red cabbage keeps long unopened and a few days in the fridge once opened.
Past its date does not mean spoiled
These are guide values for food stored correctly. A best-before date is not a throw-away date: many products are still fine after it. Check how it looks, smells and tastes. Mould, an unusual smell or a bulging can are reasons to throw it away. A use-by date is different: do not eat the food after it.