I read on this forum that someone tried grafting some Annona species onto an Asimina Triloba, but the plant died when pawpaws go dormant for the winter.
The internet says that that most Asimina species are evergreen, although the famous Asimina triloba pawpaw is deciduous.
So I wonder, would it be possible to expand Annonas' hardiness zones by grafting them onto evergreen Asimina species?
Of course, I don't know if the evergreen Asimina species are much hardier than Annonas, and at least some of them are just shrubs. I'm having a hard time finding information about most Asimina species, even about which of them are evergreen.
What do you all think?