Hi Randy,
to All Things Plants!
I know nothing about
Black Walnut (Juglans nigra) ... only that I love baking with walnuts! As a matter of fact, I just took a couple of loaves of Banana Walnut Bread out of the oven!
I too hope that you or someone else kept that great wood for crafts etc.
As stone mentioned, while very beautiful the Callery Pear can be invasive and seems to be spreading across the U.S where it is displacing other plants/trees and they produce such dense shade that it's difficult to get anything to survive planted beneath them. The Division of Forestry lists it as an invasive plant of concern in Ohio, scroll down page for information:
http://ohiodnr.com/LinkClick.a...
More information here:
http://www.nps.gov/plants/alie...
And growing information in our database:
Flowering Pear (Pyrus calleryana 'Cleveland Select') with some information.
I wonder if there are varieties of Pear that are not considered invasive that would work? It's such a shame that nurseries and garden centers continue to propagate and sell invasive species. Here in Florida there are so many invasive plants that take over and yet they are always found at our local big box store garden centers.
Look forward to seeing photo's of your gardens!