If you've already got a pantry full of dried ocean greens you know: Seaweed is a powerhouse. There are some overarching things to consider when buying any type of dried seaweed. These factors will ensure you're getting flavorful seaweed that will last in your pantry until you're ready to use it. How to store seaweedLike many pantry staples, dried seaweed needs a cool, dark, dry place to call home. It's one of the simplest varieties of dried seaweed to work with because it doesn't require rehydration before use.