> Japanese knotweed propagates primarily by seed

I don't care what the "experts" say, I have been studying this plant for more than twenty years as it has taken over our county. It propagates mainly by cuttings. I studied it for 15 years before I ever even saw a plant with seeds.  They are very rare, probably no more than 1 or 2 percent of the whole. The rest are all males, no seeds. All that pollen for nothing!! Further, the females appear to be a sterile hybrid, as I have never seen the seeds germinate. 

So, cuttings. Once they get into a stream bed, off they go like rabbits. Also, people dig them up and dump them off their property. The local road crew dumped a bunch on my neighbor's property, before he bought the farm. Now he has about 10 acres of knotweed. No seeds.

PLB

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