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Juglans nigra
NORTHERN BLACK WALNUT, EASTERN BLACK WALNUT
SKU: 2309-003
Juglans nigra, the eastern American black walnut, is a species of deciduous tree that is native to North America. It grows mostly from southern Ontario, west to southeast South Dakota, south to Georgia, northern Florida and southwest to central Texas.
J. nigra is grown as a specimen ornamental tree in parks and large gardens, growing to 30 m (100 ft) tall by 20 m (65 ft) broad. It has gained the Royal Horticultural Society's Award of Garden Merit. Under forest competition, it develops a tall and straight trunk. When grown in an open area it has a short trunk and broad crown.
Bark The bark is typically grey-black and deeply furrowed into thin ridges that gives the bark a diamond shaped pattern.
Leaves The leaves are pinnately compound and alternately arranged on the stem. They are 30-60 cm (1-2 ft) long, typically even-pinnate but there is heavy variation among leaves. The stems have 15-23 leaflets, when terminal leaf is included, with the largest leaflets located in the center, 7-10 cm (2+3/4-4 in) long and 2-3 cm (3/4-1+1/4 in) broad.[4] The leaflets have a rounded base and a long pointed (acuminate) tip as well as having a serrated edge. The leaves are overall dark green in color and are typically hairy on the underside.
Fruiting may begin when the tree is 4-6 years old. Total lifespan of J. nigra is about 130 years.
Black walnut has a strong taproot, which makes the seedlings resilient, but difficult to transplant.
Black walnut is more resistant to frost than the English or Persian walnut, but thrives best in the warmer regions of fertile, lowland soils with high water tables, although it will also grow in drier soils, but much more slowly. Some specimens have been found to survive frosts down to -43 C (-45 F). Black walnut grows best on sandy loam, loam, or silt loam type soils but will also grow well on silty clay loam soils. It prefers these soils because they hold large quantities of water, which the tree draws from during rainless periods.
Visually, black walnut is similar to the butternut (Juglans cinerea) in leaf shape, and the range also overlaps significantly. The fruits are quite different, and their presence makes an identification easy, as black walnut fruits are round (spherical) and butternuts are more oval-oblong shaped.
While its primary native region is the Midwest and east-central United States, the black walnut was introduced into Europe in 1629 and is also cultivated in Hawaii. It is cultivated there and in North America as a forest tree for its high-quality wood. Black walnut plantings can be made to produce timber, nuts, or both timber and nuts.
Black walnut is anecdotally known for being allelopathic, which means that it releases chemicals from its roots and other tissues that may harm other organisms and give the tree a competitive advantage.
The extraction of the kernel from the fruit of the black walnutc an be done by rolling the nut underfoot on a hard surface such as a driveway which is a common method. Commercial huskers use a car tire rotating against a metal mesh, and some take a thick plywood board and drill a nut-sized hole in it (from one to two inches in diameter) and smash the nut through using a hammer. The nut goes through and the husk remains
These seeds are rare and are in limited supply.
Type: Hardy tree
Hardiness zones: 4-9
Seeds per packet: 3 large nuts with husk (as in images)
Note: These seeds are large, and will have extra freight charges.
Germination: Soak the seeds for 12-24 hours before planting. Sow the seeds just under the surface and water in. Then cover them with plastic and place in a fridge for 120 days. Be sure they stay moist. After the cold-moist stratification period they are then brought back to room temperature (20-22 C, 68-72 F) for them to germinate. Germination is about 60 days after the warming period. Do not discard the planting tray, as patience is needed, and they are well worth the wait.
Juglans nigra, the eastern American black walnut, is a species of deciduous tree that is native to North America. It grows mostly from southern Ontario, west to southeast South Dakota, south to Georgia, northern Florida and southwest to central Texas.
J. nigra is grown as a specimen ornamental tree in parks and large gardens, growing to 30 m (100 ft) tall by 20 m (65 ft) broad. It has gained the Royal Horticultural Society's Award of Garden Merit. Under forest competition, it develops a tall and straight trunk. When grown in an open area it has a short trunk and broad crown.
Bark The bark is typically grey-black and deeply furrowed into thin ridges that gives the bark a diamond shaped pattern.
Leaves The leaves are pinnately compound and alternately arranged on the stem. They are 30-60 cm (1-2 ft) long, typically even-pinnate but there is heavy variation among leaves. The stems have 15-23 leaflets, when terminal leaf is included, with the largest leaflets located in the center, 7-10 cm (2+3/4-4 in) long and 2-3 cm (3/4-1+1/4 in) broad.[4] The leaflets have a rounded base and a long pointed (acuminate) tip as well as having a serrated edge. The leaves are overall dark green in color and are typically hairy on the underside.
Fruiting may begin when the tree is 4-6 years old. Total lifespan of J. nigra is about 130 years.
Black walnut has a strong taproot, which makes the seedlings resilient, but difficult to transplant.
Black walnut is more resistant to frost than the English or Persian walnut, but thrives best in the warmer regions of fertile, lowland soils with high water tables, although it will also grow in drier soils, but much more slowly. Some specimens have been found to survive frosts down to -43 C (-45 F). Black walnut grows best on sandy loam, loam, or silt loam type soils but will also grow well on silty clay loam soils. It prefers these soils because they hold large quantities of water, which the tree draws from during rainless periods.
Visually, black walnut is similar to the butternut (Juglans cinerea) in leaf shape, and the range also overlaps significantly. The fruits are quite different, and their presence makes an identification easy, as black walnut fruits are round (spherical) and butternuts are more oval-oblong shaped.
While its primary native region is the Midwest and east-central United States, the black walnut was introduced into Europe in 1629 and is also cultivated in Hawaii. It is cultivated there and in North America as a forest tree for its high-quality wood. Black walnut plantings can be made to produce timber, nuts, or both timber and nuts.
Black walnut is anecdotally known for being allelopathic, which means that it releases chemicals from its roots and other tissues that may harm other organisms and give the tree a competitive advantage.
The extraction of the kernel from the fruit of the black walnutc an be done by rolling the nut underfoot on a hard surface such as a driveway which is a common method. Commercial huskers use a car tire rotating against a metal mesh, and some take a thick plywood board and drill a nut-sized hole in it (from one to two inches in diameter) and smash the nut through using a hammer. The nut goes through and the husk remains
These seeds are rare and are in limited supply.
Type: Hardy tree
Hardiness zones: 4-9
Seeds per packet: 3 large nuts with husk (as in images)
Note: These seeds are large, and will have extra freight charges.
Germination: Soak the seeds for 12-24 hours before planting. Sow the seeds just under the surface and water in. Then cover them with plastic and place in a fridge for 120 days. Be sure they stay moist. After the cold-moist stratification period they are then brought back to room temperature (20-22 C, 68-72 F) for them to germinate. Germination is about 60 days after the warming period. Do not discard the planting tray, as patience is needed, and they are well worth the wait.
