The shelf life of your lemon zest all depends on where you got it. If you bought lemon zest from the store, then it will last longer. Typically, store-bought dried lemon zest doesn’t spoil. However, you will get the best flavors if you use it within 2 years.
If you decide to make and store your own lemon zest from a fresh rind, then the shelf life is a lot shorter. To keep it good for a maximum of 2 weeks, store your lemon zest in a small airtight container and place it into the refrigerator.
Whatever type of lemon zest you have, make sure to store it properly so you get the best results when added to your bakes and meals.