LOL Liz, that addiction would be a lot more expensive for me! I'd have to buy a new house with some land first!
Thanks for all the info. Yes, self seeding is how all those plants got there in the first place. And my little garden area is so full of bumble bees that I just don't want to remove anything I don't absolutely have to.
One of the four peonies I planted, Bowl of Beauty, did put out one flower this spring (they were all planted last fall). Below is a picture of Garden Treasure after I cut away some of the wildflowers. It looks okay, doesn't it?