Another juglans native to N. America, as with most walnuts grafted trees are critical for large crackable nuts. Black walnut shells are very hard, these cultivars a bit more crackable and nuts more readily extractable.
A sunny site with deep well drained soil will produce a fast growing tall tree. They can be self-fertile but best to plant two or more.
Images of nuts on blocks courtesy of Arie Bruin of De Acht Plagen
Variety
Description
Availability
Bicentenial
Seedling of 'Thomas' with some of its characteristics. The original tree grows in Potsdam, NY. It is hardy, vigorous and productive. The nut is large and good cracking.
December 2024
Emma K.
Bears medium to large, thin shelled nuts of excellent flavour; and is heavy and early cropping
None
Stabler
Produces some to all nuts with a single lobe. Reported very good flavor and quality if under excellent care but maybe susceptible to anthracnose?
December 2024
Thomas
Very large nut cracks out easily, thin shell. Bears early, annually, and heavily. Late vegetating. Anthracnose resistant.