growing spring onions to seed

hello I'm a novice vegetable grower and grew spring onions successfully last year. I left a couple in the ground to see if they might produce seed, but being a novice, didn't know what to do or what to expect ... and nothing happened!!!
I planted them from seed and don't want to have to keep buying seed. Does anyone know how to get seeds from spring onions???? I've planted some more seed this year and would like to discover how to do this!!!
Many thanks

 

You have to remember that last winter was very cold and very wet, so any spring onion bulbs you left in probably rotted. Grow them again this year, harvest them ALL, but keep a couple of bulbs to replant next spring, they should run to seed for you.:D

 

thanks so much for that - so if I keep a couple of bulbs in the garage and then replant these in the spring, these will shoot up? brilliant thank you