Pulled cattails at the new pond (at least 50) and a couple of phragmites. This was a former crop field and one of the phragmites was a large stem coming up threw 7-8 feet of water (glad that the water is warm). This plant must be coming up from a dormant rhizome rather than a seed based on its size and the depth of the water. There have been no phragmites in this area for over 30 years. Can phragmites rhizomes remain dormant in the soil and be viable after that much time?
I don't know about 30 years but I have been told rye seeds can remain dormant underground for over a decade.
