FL, you have now piqued my curiosity. I found somewhat confusing info online.
Amherst Nursery has a nice chart that shows Montmorency as a pollinator for Sam, but I can't quickly find a state university chart which would be a more trustworthy resource for me ( no offense to Amherst)
I also don't know the distance parameters. I do know that my two trees are about 40 feet from one another. Sam is not self fertile, Montmorency is. I don't believe any of my adjacent neighbors have cherries and we all sit on 5 acres or more. I do have wild cherries of some sort in the back woods but they don't bloom at the same time, or even bear much fruit. Both my pie and sweet cherries bloom and bear at the same time.
I will pursue this a bit more, as I have included this info in the database as a comment and will edit if incorrect. My thought is to ask WSU which is our state university with a focus on agriculture. May take awhile.
