Onion seed collection

I seem to have left one of last year’s onions in the ground. It was an onion set that got smothered by a sage plant. It doesn’t seem to have swelled up at all . But it’s throwing up some lovely healthy leaves.  What’s the chances of the seeds being viable if it produces a flower spike?

I leave all sorts of odd alliums to bolt and do whatever makes them happy. Seedlings do pop up with no help from me.
Its worth a try SC.

Ah, but do you need onion seeds SC? Had much the same dilemma in gh, spring onion gone to flower, did I need onion seed? No. In the pot for you then.