Leeks.

This is probably a stoopid question but here goes! Last year I planted lots of leeks in old mushroom boxes, not just lots but way too many for my needs. I still have a boxful down at the allotment, they are just a bit bigger than the size of a pencil and look really healthy. Do you think they would be any good to plant out??

I was afraid that may have been the answer. Thanks for your help. Onward ever onward troops!!!