Happgarden, they are doing better than expected. I added a few more petunias but they all filled nicely. I will do this again next year. I like the tower better than container because folks can see everything from a distance. The marigold flower tower back is towards the house so I didn't fill the backside with flowers and no one knew.
Edited to say I added moss roses to the marigold tower and the reds really added color.
Happgarden, those look like white Christmas caladiums. Beautiful. Thanks for the picture. I have three-tier planters not used for a few years because they dried out quickly. This is my first year for caladiums and love the colors...after seeing your pic i am thinking next year I will use the three tier for caladiums.
Every year our mg group plants the plantings around our small city. After seeing yours I may do that next year. We call them barrels but they are rod iron but about the size of a trash barrel, so short plantings can sometimes look a little odd, but a tower would really look good (if I could get them to look 1/2 as good as yours).