I don't know what variety of wild water lily grows in ponds around here but I was amazed when I cleaned out our old pond. It had been covered about 2/3 with them and had been there for many years.
I could not believe the size of the root, or tuber, or whatever you call the part that grows under ground in the bottom of the pond. Some of the roots were on the order of 4" in diameter and I don't know how many feet long. I know lots of them came up as I was dozing the muck out of the bottom of the pond.
After seeing the roots, I understand why it would be near impossible to control them mechanically (other than draining and cleaning out the pond). I would think a systemic herbicide would be the only thing that could take out such established roots once they had gotten established and any size to them.
Last edited by snrub; 03/29/14 02:36 AM.
