Aquatic Plants Surviving Winter?

[malibu73]

This is my first winter with my new pond. All summer I have been collecting aquatic plants and would like for them to survive the winter All are hardy in my zone (Zone 7). I have a bog filter filled with plants, but not so worried about it because the water is flowing and shouldn't freeze.
I also have a shelf on one side of the pond (pictured) that does not have moving water, am I in danger of loosing these plants if we get a deep freeze this winter? Is there anything I should do to prevent this?
I've read that as long as the root ball doesn't freeze the plants will be fine, but not sure how to prevent that for marginals like my cardinal flowers.
Any suggestions?

I live in Zone 7

 

[JBtheExplorer]

Hardy plants should be just fine. My bog doesn't have moving water in winter and the plants always survive, Cardinal Flower being one of them.

 

[malibu73]

Hardy plants should be just fine. My bog doesn't have moving water in winter and the plants always survive, Cardinal Flower being one of them.

Thanks, does it freeze around the plants?

 

[mrsclem]

My bog freezes and the plants come back every year. Just need to make sure not to drain the water out of the bog.

 

[malibu73]

Thanks for the replies, I finally got some water lillies tubers and they had special winter instructions and it got me thinking about all my other plants.

 

[JBtheExplorer]

Thanks, does it freeze around the plants?

Yes, it freezes all winter.

 

[frogbath]

Makes me feel good about my own cardinal flower where the top has recently died back :-D