Bill,

Water Hyacinths will be OK outside if the water temperature in the pond is
constantly over 70 degrees F. Any cooler and they will drop leaves, etc.
until the temperature rise into the 70's, which is my experience.

I won't be looking for water hycinths until late April or early May. I am
in Zone 7a.

Tom L.L.
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"Bill Stock" wrote in message
...
Wishful thinking I know.

But when can the Water Hyacinths go back in the pond, May 24th? They're
about to take over the house.