I think that is a good question. I have only one at the moment that I am giving up on, and that is Apollodorus. Yes, it has a pretty bloom, but over half of the buds never opened, just dried up. Then those that did open broke off, so I had to bring them inside to sit in a vase. That was the year it bloomed. Since then it has not bloomed, and not really increased. I feel the heat is too much for it with it's later bloom time. I have seriously been thinking of asking if any ATP member who lives further north would like it. So if anyone is game, let me know!