I was just revisiting this thread and want to say, these biennial Silene are very much like the annual Silene armeria. Except the annual Silene grow like weeds for me and you have to direct seed the annual ones or they will be tiny straggly plants. The full name of the annual ones is Silene armeria. They love my sandy soil and they do better in recently disturbed spots. I don't usually see them in the same spot each year, but new huge patches show up.
