Simple: grate it.
If you grate the nutmeg using a microplane, it should have a strong, distinctive odor you can smell from a couple feet away. If it doesn't, it's lost its flavor, throw it away and buy new.
It's fairly likely you're going to end up replacing it. I've never seen nutmegs get moldy before, and I live somewhere with 80% humidity. It would have to be stored in some very poor conditions to mold.
YES! You crack the outer dark shell, and inside is the nutmeg that you will grate and use. But do not crack the outer shell until you are ready to use it. Out of the shell it will stay fresh for 2 years, but in the shell it stays fresh for 30 years!
it can stay fresh for 2 weeks
It will stay fresh for some hours. Not too long. So it depends how long the fridge been off. Too long is bad.
Forever
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.
NutmegYou can buy nutmeg in the spice section of grocery stores.
It should be the same, but the fresh grated will taste better. The fresh will taste stronger, so if you want to get the same taste in your recipe, you have to use less. I'm am searching for an answer to how much less. I love fresh grated nutmeg, but I don't want it to overpower my baked goods.
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.
two days
i don't think it will help the lifespan of the flowers
up to the use-by date