I will have to think on this one. So many to choose from it is hard to narrow down the choices. I guess if I had only one to say its the most valuable it would have to be a seedling from an iris friend that is trusting me to enjoy it when it blooms. I am really looking forward to seeing it bloom next spring. Of the ones that I have swapped for..... they are extra precious because they are connected with an ATP friend. hmmmmm....