@groovy70s
I can see nitrates helping. They do help promote germination (without regard to age).
@ContainerTed
A good potting mix is sure a great idea. A bad mix can really put a damper on germination.
I've found that ideal temperatures (for seeds without regard to age) are different for some varieties than others, but most like similar conditions.
So, what is different about old tomato seeds that are harder to sprout vs. new tomato seeds? What changed, and why? Do they go dormant or something to help prolong viability?
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