Community News See the tree instead of the forest in search for Geauga’s largest black walnut: Valley Views Published: Mar. 24, 2020, 11:15 a.m.

Black Walnut trees present a special challenge in the landscape because they secrete a substance that is toxic to many plants.

Kuhns found the tree in downtown Ogden that turned out to be the largest English walnut in the state. The tree is off Park Boulevard and is currently owned by Ogden City.

Black walnut trees produce a toxin called juglone, which affects what can be planted under or near the tree.

Svaty said the walnut twig beetle has been infecting black walnut trees in states west Kansas with thousand cankers disease, a fungus that ultimately kills the tree. The quarantine identifies ...

Walnut trees have a reputation for being unfriendly to many plants placed beneath or even near them. Black walnut trees ( Juglans nigra ) are especially unfriendly to a wide variety of plants ...

While the trees spring up northward, rising temperatures would stress established black walnut trees in the southeast, making them more vulnerable to diseases like thousand cankers disease.

Somewhere I heard that walnut trees are fierce competitors for nutrients, and poison soil to kill nearby plants that would compete with them.