Water Gardening: Help! Need plant suggestions for bog/wet garden ..., 1 by beckygardener

beckygardener wrote:
This bog garden I am trying to fill has 10 sections in a row that are each 4' X 6' garden beds. I have the Canna as seen in the photo. And some ditch lilies that will possibly go in the same bed as these canna. I was thinking about doing 3 of the beds with that combo and some other plants as well. Maybe every 3rd bed I'd plant this grouping. I don't know? What do you think? Or should I just plant them all together in one or two beds?

The ditch lilies look like those picture in this web link:
http://davesgarden.com/pf/go/201/index.html

I hear that the ditch lilies can become invasive. I am thinking of putting a underground barrier around each bed I put them in to try to contain them to just the bed they are supposed to be in. Does anyone have any experience growing them? I am wondering how deep the tuberous roots grow?