It is likely a plum/apricot/peach rootstock. Also called VVA-1.
They probably used an adara interstem for the cherry’s.
That was their reply as well. They get them from a supplier so they could not answer directly.
There is a base graft and the 5 varieties were all bud grafts.
Ok that makes sense and makes me feel better. I might allow an Adara shoot develop from the interstem to use later if one pushes.
reposting a question here
I have two sand cherry bushes (prunus besseyi). I only see reference to putting plum on them here.
can I graft cherry to them- sweet, sour, Rainier? any kind of cherry that will be compatible that tastes better than this.
I’ve got a few cherry scions that need to go somewhere (I’ve got apricot, peach, nectarine and plum they can be tried on if the sand cherries won’t take them)
I have too many plums already, so I’d rather not do more of those.