Re: Wetland Plants

The best way to propagate these plants is to dig up the underground stem 
and plant the growing tip (or tuber) in pots underwater (no more than 
50 cm deep). This is a tough time of year to get seeds ... in about 3 
months they are readily available but I think they would be difficult to 
germinate as are most aquatic plant seeds. Perhaps your local gardening 
center would have some seeds or plants in their aquatic plant section ... 
alternatively you could check out rec.ponds.

Dr. dave.