How long do the seeds remain alive after they are dispersed?

Dear student,
seeds cant live for a long time. The viability of seeds depends on their storage.Some seeds live 1-2 days after their dispersal while others can last many years..
most vegetable seeds can live upto 2 years . eg: sweet corn , spinach. some live less than a year eg: onion. 
some live upto 5 years.eg: muskmelon and lettuce.

I hope this helped you,
regards,
sushma
 

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