You'll end up getting
seeds from it..
When you purchase onions' to grow,
they've started them, then pulled them,
for you to grow that year..
If you harvest at the end of the season, and store
like you did..
And replant..
The onion will be on it's "2nd Season" so to speak,
and will then shoot up greenery,
flower and give you
lot's of tiny, shiney black
seeds..