As a side note, I read that sometimes Black Walnuts are grafted onto
other root stock (or vis versa?), so you may not have any problems or
have less severe problems than cited for pure black walnuts.

Heh -- not this one. I brought this home as a twig on Arbor Day from
elementary school about 25-30 years ago. (And Mom never thought it
would survive -- it's now 70 or so feet tall. Grin)

James