finally foxgloves

It feels like two years ago I put in a little six-pack of foxgloves, and finally they have bloomed (is *that* what they mean by bi-ennial?).
Now that they're here, I'm wondering, why don't we have more of these? Why aren't they everywhere? Why did it take us so long? I LOVE these. (Iparticularly like this peach-y shade.) I hear they self sow readily, so maybe next year they WILL be everywhere.