How to Make a Petunia Tower -- Basically, it's a ring of galvanized fencing lined with landscape fabric, then filled with potting soil. The petunias were planted through slits in the landscape fabric. This looks like a pretty easy do-it-yourself project!
I had forgotten the cool cascading vine as a result of germinating a simple sweet potato! Beautiful Container Garden with spikes, pink geranium, lantana, violet and magenta petunias, and cascading sweet potato vine.