How deep should I plant black walnut nuts?
Thanks
Gary

Gary, this resource says 1-2 inches: http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/growing-black-walnut/

They also have a nice illustration of a squirrel-protector device for the nut that's easily made from a soup can.

I've planted black walnuts just by laying some leaves on top of them and leaving the husk on. I think they really want to grow, as long as the mice and squirrels don't get them.