Just yesterday I was looking up information that crossed that subject, but because it wasn't what I was looking for I didn't pay close enough attention.

But my subject line was "apricot rootstocks" on Google. I seem to remember reading that there were delayed compatibility issues with tomentosa under sweet cherry, but I am not sure. I probably would try it myself just to find out.

I have an Italian prune grafted to tomentosa and it is doing well in its third year, but is very, very dwarfed. It remains to be seen how long it will hold up.

Good luck,

Mark

I have had Nanking cherries for yrs. and they tend to die after about 6 or 7 yrs. I just keep planting new seedlings every 4 or 5 yrs which keeps me in nice plants. I assumed their life expectancy was very short. If so they would not be very good for grafting even if compatible.
RED