Shelf Life of Pecans With their high amount of plant-based oil, pecans also last longer at lower temperatures, preventing fats from spoiling. If properly stored, shelled pecans can last up to six months, while shelled or shelled pecans can last up to nine to 12 months. Pecans, if properly stored, can last 6 months under the right conditions. The main factor in determining how long pecans will last is the vegetable oil inside walnuts, since natural oils such as these tend to go rancid in hot or humid environments.
Since a walnut shell can help protect these oils, shelled pecans generally last longer than shelled pecans. For in-shell pecans, they retain quality for approximately four months (GPF) to one year (AP) at room temperature, one and a half years in the refrigerator, or two or four years in the freezer (GPF). Support and promote the interests of pecan shellers and the global industry to ensure the quality, safety and integrity of walnut products worldwide. As you already know, shelled pecans are well protected by their shells, so they don't need any extra protection if you leave them at room temperature.
For pecans in shell, all you need is a cool and dry place (GFP) if you're going to store them in the pantry or kitchen. That said, eating them isn't healthy either, so devouring a whole bag of stale pecans isn't a good idea. Sudden temperature changes can damage pecans and prevent them from completely thawing or defrosting properly, so you should take your time defrosting pecans. Pecans can be difficult to work with in or out of the shell, so the more you know about working with them, the better.
When freezing pecans, keep them in the freezer for a few days to make sure the pecans freeze completely. Pecans are a great option for a healthy snack, but they can be expensive, so getting the most out of them is essential. When it comes to pecans in shell, you know what you're dealing with once you open them. Most sources suggest refrigerating or freezing as the best storage options, but leaving pecans at room temperature is also an option.
Pecans should be stored in airtight containers, such as sealed plastic bags, at low temperatures to extend shelf life. If you intend to freeze or refrigerate pecans, try storing them away from open shelves or lights, such as on a vegetable tray. Alternatively, you can transfer the nuts to an airtight container or resealable bag and refrigerate them. While shelled pecans generally have a longer shelf life than shelled pecans when it comes to the pantry or freezer, they actually last much less time in the refrigerator.
As for the freezer, zippered bags are the best option, since you can squeeze out excess air and minimize contact of candied pecans with oxygen.