[thecatskinner]

A single tree will not bear many nuts. The Butternut is monoecious with the male and female flowers maturing at different times.

Bearing age is about 20 years. You might want to consider a canker resistant cultivar instead.

 

[thecatskinner]

The development has not been as successful as hoped but there is progress.

This company offers a grafted variety from cutting stock of naturally resistant trees.