Growing Onions in Containers

Here's a picture of two onion bulbs that we planted into an empty container we had on hand.  This one is actually sitting on the sidewalk in the front of our home.  We also have onions growing in the front flower bed.  

We purchased a couple of larger clay pots that were on sale this weekend with plans to start growing some blackberry bushes.  Right now we've got so many pots, I think we might need to stop buying containers for a while (lol).