How To Make Cherry Plum Tree Stop Producing Fruit
We only want the tree to stop producing fruit but not kill the tree
Certified GKH Gardening Expert
Sterilizing trees requires chemical means. If I am not mistaken, most if not all of these are banned in your state.
Unfortunately, there isn't much you will be able to do, unless you pluck the flowers before they turn into fruit.
Here is an article that will offer more information: https://www.gardeningknowhow.com/ornamental/trees/tgen/fruit-tree-sterilization.htm