answering Tom C about Ohio Plum trees
I hope you see this message. I received an email from you via gardenweb, but the email said your return email address was hidden and that I could not reply directly, sorry.
You asked about Plum trees in Ohio.
The only plum tree I have is a castleton plum. I've only been growing fruit since 2010, so I've got a lot to learn. I planted the plum in a 14 gallon container spring of 2011. (Sorry, I lost track of root stock.) Spring of 2012, it had blossoms, but those and my cherries were lost to frost. Spring of 2013 my small tree (Will be keeping it at about 6' tall), was loaded with blossoms. Over 300 plums developed. I thinned about 1/3 of those. The tree dropped the rest I'm guessing maybe
1) The tree was too young to bear
2) Not enough water
3) Although it's supposed to be self-fertile, maybe it's not.
I'm guessing that normally a plum tree wouldn't even develop plums this young. But I grow most of my fruit in containers, and that naturally dwarfs the trees and seems to cause them to fruit younger.
I'd like to know what you're growing and how it's working out for you.