I have a plum tree that I want to propagate. It has small fruits that turn yellow then red and the a bit darker when over ripe. I presume it is an American plum or similar wild plum species but I'm not sure. I would like to propagate this tree. It is a single tree and I don't see that it grows any suckers. Is it possible to root cuttings? What is the best way to go about this?

Thanks.