How long will branches with leaves(12"branches) last if vaccum sealed in a vaccum sealer machine??

Question:

Answers:
Depends on the definition of "last" is. And I'm assuming a 100% seal, which is hard to do.

If you mean, how long will the material live? Not long, 2,3 days maybe a week, it would lack the things [air supply, moisture] it needs to live.

If you means, how long will the material stay in it's present form? It should last a very long time, a years, five years, maybe a 1000 years. How long would depending on how sterile the enclosure was and how well the microbes survives and how destructive they were. Any bright colors would fad over time.

Any seeds could last hundreds or thousands of years.