I saw a lot of Virginia Waterleaf growing wild in woodlands and forests when I stayed with some friends in America. They told me that it spreads like wild fire, so I don't think that any special treatment would be needed to keep it growing, but maybe an occasional feed with a general purpose plant feed wouldn't do any harm.

Also, my friends told me that the plant is edible and the leaves are particular good in a a salad.

thanks, Myron...that's very interesting, must tell my daughter about the edible part...she has a large farm near Ottawa, is working at becoming self-sufficient...it sounds like it might be able to stay ahead of the rabbits...we'll see..sounds like a great ground cover........