I put this planter in my neighbor's yard, just over the fence from my garden. As a matter of fact, there's a cobblestone pathway through the garden next to that fencepost so she can come over, which she does, as she watches our kitties when we go away. She's a lovely neighbor! She loves gardens, she just doesn't have the time to devote to it (I think she caught the bug after living next door to me for 29 years!).
Anyhoo, she loved these pink snapdragons I got this spring, so I put a few of them in there, a tall argeretum and that trailing stuff (chiondra or something like that). But the petunias are volunteers. They have reseeded themselves in that planter now for about four years, from the purple ones I put in there when I first put the planter over there. We both love them!