I have noticed that if I want to freeze weed in jars in the freezer it is better if the weed is just slightly less dry than normal. Otherwise when I thaw it out it is really dry and just crumbles when you try to use it. If I leave a little moisture when I freeze it the weed seems to have just the right amount of moisture when thawed and the taste/smell is better.

If you are storing weed that is not in a freezer do make sure it is fully dry first.