Originally Posted By: Bill D.
Sorry for the misunderstanding. I planted mine in the pond bottom. I was wanting them to spread to provide habitat. A lot of folks grow them first in containers and them separate them and plant them in the pond bottom where they want them. I suspect if you leave them in the containers forever, they will behave themselves and stay small.


No worries... I taught everyone was leaving them in containers to avoid spreading as I understood they are quite invasive!