"Stephen Henning" wrote in message
news

Also, since zone 6 is the end of parrot feather's range there is a
chance that it might not make it through a severe winter unless it is
sunk under the water.
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All true. It is a rampant grower. It may indeed die out over a severe
winter. From what I have seen as long as the water doesn't freeze too deep
the PF just keeps sinking below the ice in the warmer layers. If the pond
is too shallow it would probably freeze or overchill and die.
--
Koi-Lo.... frugal ponding since 1995...
My Pond & Aquarium Pages:
http://bellsouthpwp.net/s/h/shastadaisy
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