Is your lotus a hardy one? If so, it should winter over in Zone 4.
The only thing you have to worry about is Not to let the tuber
freeze.

Nedra
http://www.geocities.com/Heartland/Pines/4836
http://community.webshots.com/user/nedra118

"Charles" wrote in message
...
I've done the web search and it looks like everybody read the same
book regarding this plant, but didn't tell me what I wanted to know.

What is the temperature that the plant will survive in a dormant state
to recover when the water warms again?
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- Charles
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-does not play well with others