To keep lettuce fresh for a month take the whole head of lettuce and wrap the head of lettuce in a damp paper towel and put the head of lettuce inside a plastic bag.
Store the wrapped up head of lettuce in the refrigerator.
And If you're storing individual lettuce leaves, spin the lettuce leaves dry after washing them and place them in a lettuce keeper in the fridge.
A container is best to avoid bruising and bacteria buildup of the lettuce.
Lettuce will usually keep for a whole month as long as the lettuce has not been chopped up.
Once chopped up the lettuce will last for up to 7 days.
Lettuce lasts for around a month while cut up lettuce lasts for around 7 days before it goes bad.
A whole head of lettuce will typically last for around 4 weeks if kept in the refrigerator.
Lettuce that has been taken off the head of the lettuce will last for 7 to 10 days in the refrigerator.
Bad lettuce will usually start smelling bad, change in color from the green to a brown and may also become wrinkled and sometimes slimy to touch.
When lettuce is bad the lettuce will start changing colors and may turn a brown or yellow color, the bad lettuce will usually be wilted and have a slimy feeling to it and also the bad lettuce may have a sour or bad smell to it.
If the lettuce smells bad is really wilted or slimy or has changed colors then throw it out and avoid getting sick.
It's OK to eat expired lettuce as long as the lettuce is not actually spoiled or has gone bad.
The expiration date on the lettuce does not mean that the lettuce is actually bad or unsafe to eat.
As long as the lettuce is not wilted, does not smell bad or slimy then the expired lettuce is okay to eat.
I have eaten expired lettuce before and I've never gotten sick.
The expiration date on most food does not mean that the food is actually bad or unsafe to eat.
Just examine the food for spoilage and if it is indeed spoiled then throw the food out but you don't have to throw food out just because it's expired.