I did a germination test in January to not only test my own saved seed but to test
my seed starting soil for this season. All good.
ProMix, fresh bag, potted up a few early March seedlings to test that as well. Far ahead
of my main seeding trays. All good.
I still lost most of one tray out of 6, yet to be determined what happened, but I can cross off seed and soil quality....
If you can't test your potting-up soil due to timing, get the best you can afford from a
reputable source...You can wet it for 24-48hours and give the sniff test. Should smell clean and earthy, not diaper funky.
I have a small bag of FoxFarm, garaged, an overwintered outside half bag of Sungrow, totally soaked
wet, and my fresh ProMix. All did fine side-by-side but I would never use old wet soil
for tomato seedlings. I used the rest of it for refreshing outside deck salad and herb containers.
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