Juglans nigra – Black walnut

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Juglandaceae

Juglans nigra – Black walnut

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A large tree which, in exceptional cases, can live for 250 years and attain a height of 50 m. The old trunk turns a very dark colour and has deep grooves. The young brown twigs carry hairs but are bare when older. The large pinnate leaves have 7 to 11 pairs of leafets and grow to a length of approx. 60 cm. The separate leaf segments are elongated to lanceolate and measure approx. 10 - 15 cm. The leaf gives off a pleasant smell when rubbed. Shortly after the appearance of the leaves the pendulous green male catkins (approx. 6 - 9 cm) and the smaller female flowers appear. The latter are single, sometimes 2 to 4 grouped together. The spherical fruit (4 - 5 cm in diameter) are often found in groups of 2 to 3: the husk is rough and gives off a characteristic soapy odour. The shell of the nut is brownish-black and it has a very tasty kernel. The tree is an important producer of wood.
Size
Root ball size
Packaging
Amount
Delivery period
700/800 multistem
Wire rootballed
Nov-April
Root ball size
Packaging
Wire rootballed
Delivery period
Nov-April
Stock
Limited stock
Specifications
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Height
20 - 40 m, fast growing
Width
20-30m
Crown
broadly pyramidal, later spreading, half-open crown
Bark and branches
deeply grooved, dark trunk, twigs light brown
Leaf
paripinnate or imparipinnate, bright green. 40 - 60 cm, feathered leaf
Flowers
♂ catkins, ♀ singl♂ or grouped, Ma♂ June
Fruits
a practically round nut, outer wall of fruit grooved, edible, edible fruits
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
nutritious, calcareous, drained soil
Paving
tolerates no paving
Winter hardiness zone
5a (-28,8 to -26,1 °C)
Wind resistance
good
Other resistances
resistant to frost (WH 1 - 6), can withstand wind
Application
avenues and broad streets
Shape
clearstem tree, multi-stem treem
Origin
eastern and central North America
Clear stem tree Multi-stem tree calcareous soil clay soil loamy soil sandy soil tolerates no paving resistant to frost (WH 1 - 6) can withstand wind broad conical 1st size , taller than 12 metres half-open crown green green late sprout fast growing Feathered leaf non-toxic (usually) Ornamental fruit Edible fruits
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Frequently asked questions
Juglans nigra

Juglans nigra can eventually reach a height of 20 - 40 m, fast growing, depending on the site and climate conditions.

Juglans nigra is fast growing and can eventually reach a height of 20 - 40 m, fast growing, depending on the site and climate conditions.

The right time to plant Juglans nigra is during the dormancy period. In Western Europe, Juglans nigra with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.

Juglans nigra blooms in may.
General