Juglandaceae

Juglans nigra

Black walnut

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 bar… Read more

Important properties
Height: 20 - 40 m, fast growing
Crown: broadly pyramidal, later spreading, half-open crown
Leaf: paripinnate or imparipinnate, bright green. 40 - 60 cm, feathered leaf
Flowers: ? catkins, ? single or grouped, MayJune
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) all species Edible fruits
Juglans Nigra-1
Juglans Nigra- Gesneden
Juglans-nigra
Juglans Nigra
Juglans nigra
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.
Specifications
Height:
20 - 40 m, fast growing
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, ? single or grouped, MayJune
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
Leaf:
paripinnate or imparipinnate, bright green. 40 - 60 cm, feathered leaf
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, parks, large gardens
Shape:
clearstem tree, multi-stem treem
Origin:
eastern and central North America