Sink them to the deeper level in the winter.
This will keep them from freezing.

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

"bern" wrote in message
om...
zookeeper wrote in message
...
bern wrote:

I have tried several different types, but since they are treated the
same as the hardy lillies, they have been in 30 quart tubs recently.
They get sunk to the bottom of a 3 foot deep part of the pond. Now,
the soil I use is not heavy clay, which I have been told is needed by
lotus. Do you guys use heavy clay? My hardy lillies love the soil
mixture I have been using. BTW, we are zone 5.

If you're sinking the lotus to 3 feet depth, that is the problem. They
should only be under 4-6 inches of water. Lilies can be 2-3 feet deep,
but not lotus.

Sorry I didn't make myself clear. During the summer they would be 4-6
inches deep. I sink them deep only in winter when they are dormant, to
try to minimize frost damage. Should I leave them shallow even in
winter?