How Long Do Seeds Last and Are They Still Good? Julie Thompson-Adolf is a Master Gardener and author with over 30 years of expertise in yr-round natural gardening; seed beginning, rising heirlooms, and sustainable farming. How Long Do Seeds Last? A packet of vegetable seeds could look dry, brittle, and lifeless, however old seeds are very a lot alive in lots of circumstances. Inside each plant seed is the embryo of a future plant. However, seeds do not stay alive endlessly and will expire. How long seeds last will depend on the type of seed and the way effectively it is saved. Read on to be taught how you can tell if previous seeds are nonetheless good based mostly on a sprouting check and look at how some seed varieties last on average. Most vegetable seeds remain good for about two to a few years, but some, akin to onions, deteriorate inside a year. Lettuce, on the other hand, can efficiently sprout after 5 years. The most effective solution to retailer seeds is to verify they’re dry, then store them in an airtight container, and keep the seeds at a consistently cool temperature.
