What is the maximum degree of coldness that can be borne by stored seeds?

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Andrew Paul McKenzie Pegman

I think it's -18 degrees C

James Garry

Saddam,

A 10 sec Google reveals this:

https://naldc.nal.usda.gov/download/42490/PDF

TLDR: Lettuce seeds (and perhaps many other plants) tolerate cryogenic temperatures for decades. Note figure 3 and the Avrami function.

Ruth Sellman

http://agron-www.agron.iastate.edu/courses/Agron338/Content/Seed%20storage%202013.pdf