The plates are hung using adhesive discs. The 4" disc can support a plate up to 6lbs. They have little metal hooks so they're easy to hang, and the discs come right off with hot water! From Hobby Lobby: The small ones were 1.99, the large ones were 2.99.
Love this exterior: paint color, wood stain (door and porch), white trim, windows and transom windows, roof peeks, attic windows, front door (I would add some transom windows on either side), porch light, porch railing & steps, etc.