How to Make a Petunia Tower -- Basically, its 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!
a flower tower is one of those great gardening ideas you could try out, especially if you have limited gardening space or limited sunlight. Strawberries, rosemary and lots of other produce grow well in spaces like these.