Fergusmom said:self-sewn black walnut is straddling my neighbors fence line.
This is not a horticultural answer...it's more of a legal one. Have you had the property surveyed and do you know exactly where the property line is? Many times people erect a fence not exactly on the property line; hopefully you will learn that the tree is yours. When I paid the surveyor to make the 4 corners my yard suddenly got 4 feet larger along one side; the neighbors fence is nowhere near the actual line.
Good luck and hope everything works out.
