Do you know your onions?

If they weren't invasive, they're worth growing. The flowers are lovely - like white bluebells. The leaves are usable throughout winter when there's not much else. They're like spring onions.
I made a mistake by planting them as I hadn't realised at the time how much they spread. I dig up clumps of them now, eat the leaves and burn the roots (NOT in the compost!). Also mow off the flowers before they set seed.
Such a shame as, otherwise, they have everything going for them.