[OptaGreen]

I am looking for suggestions on how to contain some aggressively spreading marsh/bog plant materials; i.e. cyperus, rush, iris, etc. I am putting together some ideas for a small "pond" at the entry to a riverbound subdivision. The "pond" is about 35x35. There are already some existing trees, cypress, willow and such, planted not so close to the pond's edge, so the idea is to bring some plant material to the edge. I am not looking to overpower the pond with materials, however. I have read several times that these plants should be planted in a "container" but am not sure what type of container. An empty plant container? A solid container? Any other plant suggestions would also be appreciated. Also, the pond has an inlet/outlet to/from a freshwater source. (if you consider swamp, freshwater)