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Black Walnut

Master Gardener Program
Erika Johnson, Program Coordinator
erika.d.johnson@wsu.edu
(564) 397-5738


Catalog of Trees

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Black Walnut HT5

Black Walnut tree

Tree Statistics
Common Name: Black Walnut
Botanical Name: Juglans nigra
Trunk DBH (diameter at breast height: 74 inches
Height: 115+ feet
Spread: 88 feet
Heritage Tree ID: HT5

Tree Location
Sunnyside Neighborhood Association
9500 NE 107th St
Vancouver, WA 98662
View in Google Maps

About the Species

Juglans nigra, the eastern American black walnut, is a species of deciduous tree in the walnut family, Juglandaceae, native to North America. It grows mostly in riparian zones, from southern Ontario, west to southeast South Dakota, south to Georgia, northern Florida and southwest to central Texas. Wild trees in the upper Ottawa Valley may be an isolated native population or may have derived from planted trees.

Black walnut is an important tree commercially, as the wood is a deep brown color and easily worked. The fruits, walnuts, are cultivated for their distinctive and desirable taste. Often, trees are grown for both lumber and walnuts simultaneously and many cultivars have been developed for improved quality nuts or wood. Black walnut is currently under pressure from the thousand cankers disease that is causing decline of walnuts in some areas. Black walnut is also allelopathic, which means that it releases chemicals from roots and other tissues that harm some other organisms and give the tree a competitive advantage; this is often undesirable as it can harm garden plants and grasses.

History of This Tree

The previous owners said the tree was large when they bought the house in 1949. The house was built on 1902 and they think that the tree was full grown then. It’s been cut in half twice because of its growth.  During World War II the owners were offered a substantial amount of money for the tree for furniture but they turned it down.

Black walnut tree trunk


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WSU Clark County Master Gardener Program
1919 NE 78th Street • Vancouver, WA 98665
(564) 397-5738

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