Interesting I wonder If they just grew thousands , and found the ones that lived ,
or if they protected them for a some years so they could handle the cold.
I'm in -20 F USDA zone 5 b
Will have to watch next time I eat dinner
will look up some articals on it in a few days if your interested
(Im a caregiver so I can do that in my spare time I've seen your posts
right now as a matter of fact I'm trying to forge wild pawpaw for this week(asimina triloba not payapa)
so I can graft seleted wild types onto my tree's (or persimmon ) have fun forging.)