Hello,
I'm a white Sapotes enthusiast, unfortunately in France it's very difficult to get hold of them, there are only a few trees in the botanical gardens on the Côte d'Azur.
I'm surprised to see Younghan's Gold classified as Casimiroa tetrameria, as I have a grafted tree and the underside of the leaves doesn't seem very downy to me.
What are the characteristics of C. tetrameria that distinguish it from C. edulis? It seems to me that the seeds are smaller, the leaves broader and the undersides downy? Any other unique features?
Both C. tetrameria on C. edulis and visa versa produce dwarfing one combination more than the other.
There's obviously a strong grafting affinity between these two Casimiroa. Is it also possible to graft onto C. pringlei?
Have had C. edulis damaged by frost, but never had C. tetrameria show any effect.
I thought it was exactly the opposite, thanks for the feedback. What temperature did your trees endure?