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I have not seen it much on this site, but some of the other sites Mrs Inor and I go to they seem to get into blood feuds over whether it is okay to vacuum seal heirloom seeds for long-term storage. So, we decided to start some heirloom peppers and tomatoes that we had sealed with a FoodSaver maybe 5 years ago. So, here is the result:
The final stats:
- Every planting germinated.
- The tomatoes were breaking dirt within 2-3 days.
- The peppers took about a week or maybe 9 days. But the room where we started them does not get full sun all day and we have also several days recently without any direct sun. So I expect that slowed the peppers down some too.
So, based on this experience I am going with the notion that it is perfectly safe to vacuum seal seeds and expect them to grow in the future.

The final stats:
- Every planting germinated.
- The tomatoes were breaking dirt within 2-3 days.
- The peppers took about a week or maybe 9 days. But the room where we started them does not get full sun all day and we have also several days recently without any direct sun. So I expect that slowed the peppers down some too.
So, based on this experience I am going with the notion that it is perfectly safe to vacuum seal seeds and expect them to grow in the future.