OK, so I bought some spring onions to use and since the price was
right I bought a few extra bundles. The fridge was full so I kept a
bundle in a glass of water like cut roses. Lo and behold, they
started to sprout roots. Can I plant these? Will they start growing
little offshoots to the sides? Will they grow seed pods and will I
get little spring onions sprouting up next spring in my pots or
gardens if I plant these in the ground?

BTW, I did the same with lemon grass too and they have sprouted little
roots also.
Thanks,
Wil