Posted: 21/09/2014 at 14:53
Hello, Pindy, welcome to the forum.
Congratulations on your efforts so far.
I have to confess I don't usually grow them in pots because being very deep rooted I prefer to grow them in deeply dug ground. So (with this in mind) I would suggest you use the deepest pots/containers you can......something around 18 inches deep.