What is the best way to store flower for long periods of time?

In a plasic container

For large amount +1 ounce buy a air tight jar from the store or a washed sanitized spaghetti sauce jar and put your weed in it take out what you would like for a few days and put the jar in the freezer the freezer will keep it fresh a crisp for weeks but dont get into the jar alot opening and closing allows fresh air to get on your buds