Growing Onions From Fully Grown Bulbs

Question

I had an onion in my fridge that had started to sprout. I left it for a couple of weeks, during which time it grew quite a bit more. I planted it in an indoor pot and it has shot up! It has quite a few long ‘rubbery’ leaves around ten inches long. Am I likely to see anything from planting this bulb, and how will I know when to pull it up?

Answer 1

You won't get more onions from it, but you will get flowers. You can harvest the seeds from the flowers and grow more onions from those next year.