Bill Stock wrote:

Sounds like I need to grow it in a tub. I did not realize GF think of
Duckweed as Potato Chips.


Oh, the GF eat that stuff like an addiction! All of my duckweed is gone, I
tried replenishing it, but the GF are faster then I am.

Maybe you got a bad batch of WH. Mine(I live in Brampton) are doing
beautifully, multiplying faster than I can handle, though no flowers yet,
which is probably a little too early in our neck of the woods considering
the weather we've had.