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Old February 13, 2017   #18
brownrexx
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Join Date: Feb 2016
Location: Southeastern PA
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I am not a seed sprouting expert but I think that moisture and warmth are what most tomato type seeds are seeking. Other seeds with tougher seed coats may need additional help.

The seed coat is a barrier against dehydration of the embryo inside. Once the embryo inside becomes dehydrated it is dead but until that point, if you can rehydrate the seed coat to the point that it allows the moisture to penetrate to the inside then the embryo will most likely grow.

I have not tried to grow really old seeds. I usually only keep my seeds for 4-5 years but if seeds are stored in an environment that is not too hot and dry then I don't see why growing older ones would be a problem.
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