I agree with Ami. Somewhere around 5 years is a good middle ground, and it will always depend on storage techniques and environment. In order to freeze seeds for storage, the water content must be quite low. Otherwise, the freezing will cause the ice crystals to destroy the seeds.
Most of us do a good job of drying seeds and then store them in paper envelopes or old pharmacy bottles. Personally, I now use the pharmacy bottles and will sometimes put one of those desiccant thingies in to help keep things dry.
Even with all things seemingly equal, the best way to know how long a certain batch of seeds are lasting is to do a germination test. That's right. Just put a few into your choice of growing mediums and see how many (what percentage) come up.
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Ted
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Owner & Sole Operator Of
The Muddy Bucket Farm
and Tomato Ranch
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