Central Oregon

[SherrieNadine]

I have just started an island garden and need to know the best plants to use. We live in Central Oregon so we have a short growing season. I want to put in some wildflower seeds as well as some perennials that can grow and bloom in partial shade. I read that viola's and lobelia work well but I want some larger plants that will come back in the spring.
Anyone have any good ideas on what I can use? Thanks for the help. SherrieNadine