A friend has two cherry bushes (prunus tomentosa). Prunus tomentosa is said to be partially self-fertile, but benefits from cross-pollination.
The two cherry bushes set fruit, and so my friend saves me two seeds. I plant the seeds at my house, which is miles away from his, and now have two bushes of my own. They are in bloom.
My cherry bushes are siblings. How will this impact their ability to pollinate?