Properly stored, an unopened bag of prewashed salad mix will usually keep well for about 7 to 10 days in the fridge (or the date on the package, if earlier).

How long can you keep bagged salad?

With proper storage, bagged salad mix can last 7-10 days after opening.

Is it safe to eat bagged salad after expiration date?

You can use it past the expiration date, just make sure it doesn't smell funny. ... Frozen food: These products will keep long after the expiration date, but if we're talking meat, the expiration period will usually only extend by 50%. Packaged greens. It's OK to eat the lettuce if it's wilting, just not decaying.