New answers tagged seeds
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Heat is definitely a factor in viability. Some species more than others: https://duckduckgo.com/?t=ffsb&q=seed+viability+heat&ia=web https://www.researchgate.net/publication/261617200_The_Effect_of_Temperature_on_the_Viability_Of_Weed_Seeds_in_Compost
Looks like the only way you'll find out is to try them and see.
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I also think it is not a plantain.
I would mow the lawn regularly. As you see, the weed is tall, leaves exit the steam from a relatively high position. I would expect that such weeds will not survive if you cut often their leaves. The worst weeds are the the weeds which make a lot of stolons, ant they run lower on grass.
So mow your lawn regularly (maybe ...
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That looks more like violets than plantain (too high to be plantain, which is about a half-inch tall rosette at this point in the year, assuming that you're in the Northern Hemisphere). The first photo also shows something with a fern-like leaf (Queen Anne's Lace maybe?). The grass itself looks old enough to walk on, so if you're careful you can try to ...
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Mold seeds doesn't mean that the seed is completely died, it can germinate but high moisture content will speed up to rot
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I have started collecting my avocado pits. I'm not sure how long they keep, just don't let it dry out! They're a bit involved for growing from seed but here's a link describing the process:
https://www.californiaavocado.com/avocado101/your-own-avocado-tree
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