Jason - Chad Harris of Mt. Pleasant is really nice to work with. If you have concerns specific to the Cascades (I know the rain you are talking about - I used to do archaeology in the Gifford-Pinchot National Forest), I would give him a call first. He can help you decide which types of iris may work best for you. And he recommends other vendors too, he isn't just intent on selling his own. So you won't be pressured to buy anything. He loves irises and is willing to share his knowledge.
