I've heard that there were batches of Nam Doc Mai #4 grafted by Zill's High Performance Plants that were on dwarfing rootstock. I have a Nam Doc Mai #4 that is growing slower than any of my other varieties.
How would I know if I scored a dwarfing rootstock? What varieties would it Dwarf?
What would be the best flavored vigorous variety I could graft on it if it can be surmised to be dwarfing rootstock?