I read an article where the state of tennessee was stocking florida strain largemouth in some of their lakes to increase genetics and they talked about a line in their state that was as far north as florida's could make any difference in the bass' total size or genetics.

I am not sure where exactly that line is but a search on the web about "tennessee florida largemouth" might yield a result.

-Allch Chcar
Living the dream, 21 acres. No pond, yet.