I knew of some in southern Kentucky that winterkilled last year. I'm also aware of some populations in Tenn. that appear to be holding on.

It's not just a matter of survival, you want a BG that will flourish and perform well for your area. Southern fish may or may not survive, but will they perform as well as a northern fish that is better suited to the climate?

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.