Shallots in a bin

I decided to grow some Shallots in the greenhouse planted in our old kitchen bin this year as well as some outside in the veggie patch. They're coming on great - loving deep composted soil. At the time time of writing they're currently 2-3 times bigger then the ones planted outside in the ground.

I've just read though that you're supposed to plant them about a foot apart. It's going to be interesting then to see how these turn out.