Forkert???... I've never heard of them
I'm pretty sure that one would be hard pressed to find any old-named Pecan tree that wouldn't thrive in either Texas or FL. I planted a hardy almond tree and a Metheley Japanese plum tree this year for future SHTF along with a pair of Missouri Bignut Hickory trees to replace the soft maple and cotton wood trees that died in last winters severe freeze.
A few years ago my mother purchased a Japanese ornamental Plum tree at Lowes on clearance for $5.99. I hope that the self-pollinating Metheley plum tree will also pollinate my mothers tree.
I wish that I could find a pair of the wild red Texas plum trees that my mother transplanted from around Lake Conroe when I was a kid. Those small wild plum trees put on very sweet golf ball size red plums that made the best tasting plum jelly... It put Smuckers red plum jelly to shame
Best,
BJ