Something I just thought of. A while back there was a discussion of cherry rootstocks and their ability to handle hot soils. Z-Dwarf was put forward as a possibility for people in hot summer climates to help their sweet cherry trees handle the heat. I wonder if Adara, being P. cerasifera, would be useful on this front as well.
According to the research report, Montmorency is incompatible, and I don’t recognize the sour cherry cultivars said to be compatible (Ferracida, Negra de Serra, Reina Hortensia, Temprana de Sot). This would be an interesting project for anyone with a wide variety of sour cherry cultivars to test for us. (Hint, hint!)
Personally, I’d like to see if I can get something like Royal Rainier to take (just came off patent, looks like) because it would be nice to have a blond lower-but-not-little-chill cherry to complement my Lapins. RR is incompatible with Z-Dwarf.
Which is to say, I would be interested in cuttings to root (?) whenever you have some extra. 