What seeds expire quickly?
Most seed stored properly will last for several years. A few seeds are good for one year only, such as onions, parsnips, parsley, chives, shiso, scorzonera, Batavian endive, licorice, pennyroyal, St Johnswort, liatris, delphinium, larkspur, perennial phlox, and any seed that has been pelleted or hot-water treated. Every plant is different. Some, like lettuce, last longer, and others, like onion, go bad very quickly. Still, most seeds remain good for about 2 to 3 years. Practice good seed saving techniques to extend the life of your seed.Another option is to use only the seeds you need, and then store them in a cool, dry location – usually in a plastic bag. Or, you can store them in a refrigerator or freezer to keep the seeds fresh for next year. Most seeds will be viable for two or three seasons, and then you only have to buy seeds occasionally.Why fresh seeds are always best. Generally, most vegetable seeds for example, will be viable for between 2 and 8 years. While old seeds might be fine, and they might grow into relatively healthy plants, they might not be as vigorous as plants grown from fresh seeds.Seeds don’t actually expire. If you have stored them in a cool, dark (and dry) place, they will still germinate for years after the ‘expiration’ date. I have had plants seeds for several years and still plant them especially since they been stored in a dry cool spot.