I bought a hundred Vallisneria americana where John did, and I'm going to plant them and some lilies in my CNBG pond.
I got the same Lilies I had purchased before, and have had very good luck with them surviving last years drought, and having a very slow spread.
The great part for me, is I can keep the water level constant with a pump from the big lake, so I will be able to tell if they are a safe option for that too.
