English Walnut Trees Keep Growing Up From The Roots. The Previous Years Growth Is Dead. Trees Are Seven Yrs Old And Only About Fou

Question

r feet tall

Answer 1

They should be hardy in your area, so I'm not sure why the top growth died. However, English walnut trees are usually grafted, so the suckers coming back from the roots are from the rootstalk, so you don't want to propagate the tree from those.
You can remove it by cutting down the dead growth and applying a stump killer.