There was a thread a while back by someone who had kept some queens in a queen bank for 6 months or so. He was wondering if they would be any good. I don't remember the answers, I don't think anyone reported a maximum time in a bank. It seems the jist was to report back in when he knew from his experiences. If he ever did I missed the thread.
I am wondering how those queens did and also what others experiences are with banking queens for extended periods, ie over winter, let's say 4 - 5 months.