My island also has mostly standing water on it, it's a balance of enough flotation vs how much dirt you put on it.
As long as you put water loving plants on it no problem, of the different water plants I put on it last year the hardy water Canna, and the Iris survived the winter. I also have what I call Swamp grass on it but it's just stuff I found growing in wet areas of the property.
Another good plant that should make it thru the winter is pickerel weed, I have those on the natural islands.

How about some pics?

Last edited by adirondack pond; 08/09/10 06:25 PM.