Let’s be real: spinach is a diva. It lasts about 3 to 7 days in the fridge, max. It depends on when you bought it and how fresh it was. The “best by” date is a lie half the time—trust your eyes and nose over the package. Pre-washed bagged spinach? That goes bad even faster. The moisture from washing speeds up the spoilage. So if you bought it on Sunday, plan to eat it by Wednesday. Yes, I’m serious.
To make it last longer, store it dry. Line your container with paper towels to soak up moisture. Don’t wash it until you’re ready to use it. And keep it in the coldest part of the fridge, not the door. That’s basic spinach survival 101.