usually nine months from it's birthdate. always noted on the bottle.
it can stay fresh for 2 weeks
Forever
It will stay fresh for some hours. Not too long. So it depends how long the fridge been off. Too long is bad.
cod will stay fresh forever if you freeze it in a air tight bag.
i would say brownies stay fresh for about 3-5 days if they are in a sealed container.
Weed stays fresh for a long time. You can put it in a plastic bag to keep it fresh for a long time or you can also freeze it.
salt wil make it stay fresh for a while :D
two days
i don't think it will help the lifespan of the flowers
up to the use-by date
two days
one mth