“Walking onions? I could never have too many onions!”
Click on the link in 53. If you get some of those and I see they are totally cheap, you will never have to plant onions again, ever, in your whole life. Just don’t plant them where they will crowd out your regular garden.
Solid! Sort of like you treat mint (I adore mint and have never had it take over the garden). Will research if they can be planted in an oak half-barrel or a fabric bag or something.