“Black walnut trees will produce walnuts encased in a green semi-hard shell,” notes St. Clair. “They will remain on the tree in the growing season and then fall off the tree in fall.

Carefully separate shell bits from the nuts ... the eastern American black walnut tree (Juglans nigra) grows in Hardiness ...

The University of Missouri’s Center for Agroforestry has announced an official patent for its first black walnut cultivar,.