3 miles is unlikely? What about half way around the globe? Again, I think you are underestimating the power of nature.
Well, I know it's not a plant, but take into consideration the Zebra Muscle. It is native to Eastern Europe. Yet, it managed to spread to many of the inland lakes of OH, PA, IN, KY, NY, etc., etc. All from taking a joy ride across the Atlantic Ocean attached to atleast one sea going vessel. It was literally billions strong in Lake Erie and has cost tax payers (you and myself included) millions of dollars. And who knows how much more it will cost in the future. Like I said before, I know the ZM isnt a plant, but with WS, as adaptive as it is, imagine the possibilities of what could happen. Is it worth the possibilities, just to have a few bunches growing in a goldfish pond?
As for a plant, how about the Eurasian Water-Milfoil? It was first found in Ohio waters in 1950. It was introduced by people much in the way you are doing, and in 60 or so years, it has managed to get into nearly every major body of water in OH.
Like I said, it's my opinion. You have yours. Do as you like. But I am sure there are lots of folks hoping you rethink your actions. I know, for me, after seeing how fast and easy WS is to grow, I wont even throw clippings of it in the trash. I let them dry out and light a match to em.
