Black Walnut vs Kentucky Coffeetree - TreeTime.ca

Black Walnut vs Kentucky Coffeetree

Juglans nigra

Gymnocladus dioicus

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Black Walnut
Kentucky Coffeetree

The Black Walnut is a slow growing, large, straight-stemmed tree with an open crown. It produces dense, very hard, edible nuts.

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.

Despite being highly valued for its edible nuts and its shade tree aesthetics, it is rare to see this tree on the prairies.

Note: Black Walnut's 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.

Note: Plant this tree once. It will not respond well to transplanting.

Note: Although self-pollinating, planting two trees significantly improves nut production.

A top CO2 absorbing species. Experts think this tree may help climate change more than others.

The Kentucky Coffeetree has the largest leaves of any native tree in North America! In the summer, its large green canopy provides shade. While in the winter, its leathery bean pods act as a decorative element against the sky as they rattle in the wind. Beautiful year-round, this tree is an elegant addition to any landscape.

Black Walnut Quick Facts

Kentucky Coffeetree Quick Facts

Zone: 3a
Zone: 3a
Height: 14 m (45 ft)
Height: 21 m (70 ft)
Spread: 9 m (30 ft)
Spread: 15 m (50 ft)
Moisture: dry, normal
Moisture: dry, normal
Light: partial shade, full sun
Light: full sun
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no
Nuts: corrugated nut with edible meat
Growth rate: slow
Growth rate: medium
Life span: long
Life span: long
Suckering: low
Suckering: high




Toxicity: Uncooked pods are toxic to humans
Other Names: american walnut
Other Names: coffeetree