Q.What kind of plum tree do I have
Is there any way to tell what type of plum tree I have? I have never been able to get it to fruit in spite of planting several other plums (Superior, for example).
Your best option would be to either consult a local nursery or find your local University Extension office. Either of them should be familiar with the varieties of plum tree that grow in your climate. Find your local Extension office using this link: https://www.gardeningknowhow.com/extension-search/