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Originally Posted by Redfrog
How long are seeds viable. I have some that "What's her name" left here that may be a couple years old. Are there advantages to using potting soil or other specialty blends
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Storage is the biggest thing for seeds. Humidity and heat will shorten shelf life. Like I said I'm using 10 year old carrot seed with out issue but its hard to tell, I seed them so thick I wouldn't know if half didn't germinate.
If you have lots and want to check, take 10 seeds and put them in a wet paper towel. Keep it in a warm place and damp. Check it in a week and see how many sprout.
I like using potting soil because it generally has less weed seeds in it than anything I dig around here. I haven't ever tried starting in any other type of medium or mix so can't help you there.