Where are you located? Our winter got to 20 degrees, briefly (Jackson, MS).
The WH got no protection at all. We had ice about 1/2" thick for a few
days. The majority of the WH plants died. A significant number made it
through (~25%).

Last year we put plastic over our WH and had more like a 70% survival rate.
Maybe we will do that again next year to get a running start. We had
several hundred last year. It is a good way to start the season.

-- JIM
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See our pond at: home.bellsouth.net\p\pwp-jameshurley
Check out Jog-A-Thon fundraiser (clears $140+ per child) at: jogathon.net
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"Beak 21" wrote in message
...
Some of my water hyacinth survived the harsh winter with just a plastic
sheet over the pond. It got down to below 30 degrees also. they are
starting to send out new growth. Who else has this happening?