A large tree valued for its lumber. The large size and toxin produced by the roots, limits its use in the urban landscape.
Pronunciation
(JU-ginz)(NIE-gra)
Plant Type
All Plants, Trees Deciduous
Hardiness Zone
4-9
Sunlight
full
Moisture
average
Soil & Site
average
Fruit
nut surrounded with a green husk that rots to a black pulp, very hard to crack
Leaves
pinnately compound leaves with 13-27 leaflets
Roots
forms a deep tap root
Dimensions
50-75 feet tall or greater by equal spread
Maintenance
Mature trees produce a plethora of green coated walnuts that are a mess to clean up. Squirrels will plant these everywhere.
Propagation
cold stratified nuts
Author's Notes
I grew up in north western Wisconsin (USA), where this tree was absent. I moved to south eastern Wisconsin where the tree is plentiful. Early in my teaching career one of my students offered to me a bushel basket of Black Walnuts. I accepted thinking this should be great eating fresh Walnuts. Little did I know that nuts are tasty but extremely difficult if not almost impossible to crack. Also peeling off the green husk turns your hands walnut color.