Fatih, I would not use cottonwoods. They, like willows, suck a lot of water from a pond. And, they reproduce like crazy. Every year, I walk around my pond pulling them up. And, there are none on my land. I think the tiny seeds spread by wind.
When driving around country dirt roads I often see big cottonwoods and/or willows. If I stop, I usually find a silted and dry pond.
Last edited by Dave Davidson1; 11/12/14 10:07 PM.