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White Oak vs Black Walnut

Quercus alba

Juglans nigra

White Oak
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White Oak is large, long-lived tree with an irregular trunk divided into spreading, often horizontal, stout branches. A highly adaptable tree, White Oak features beautiful green leaves that turn red-purple in the fall and green acorns.

The Black Walnut is a slow growing, large, straight-stemmed and high value timber tree with an open crown. It produces a dense, very hard, edible nut. The root system usually includes a deep tap-root and several wide-spreading and deeply set lateral roots.

Black Walnut has a deeply-furrowed, black bark. Its Leaves are about 1 foot long, composed of 15 - 23 slightly stalked leaflets on a moderately stout stock which provide good dappled shade.

Its roots produce a substance named juglone that is toxic to some other plants. Consider this when choosing where you plant a black walnut, as you will not be able to grow tomato, potato, cabbage, eggplant, blueberry, azalea, rhododendron, lilac, red pine and apple in the surrounding area.

Despite being highly valued for its edible nuts, high value timber, and its shade tree aesthetics, it is rare to see this tree on the prairies. Plant this tree once when it is young as it does not respond well to transplanting.

WHITE OAK QUICK FACTS

BLACK WALNUT QUICK FACTS

Zone: 4a
Zone: 3a
Height: 30 m (98 ft)
Height: 14 m (45 ft)
Spread: 9 m (30 ft)
Moisture: dry, normal
Moisture: dry, normal
Light: partial shade, full sun
Light: partial shade, full sun
Fall colour: dark red
Fall colour: yellow
Bark: light to dark gray to white, fissures and scaly
Nuts: nuts within acorns; attractive for wildlife
Growth rate: slow
Growth rate: slow
Life span: long
Life span: long
Maintenance: medium
Suckering: none
Suckering: low
Pollution tolerance: high
Pollution tolerance: high







Ships To Canada: yes
Ships to USA: yes
Ships To Canada: yes
Ships to USA: yes