Juglans ailantifolia – Japanese walnut

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Juglandaceae

Juglans ailantifolia – Japanese walnut

View prices and availability
Large park tree with broad, round crown, up to 20 m tall and broad. The first-year twigs are densely covered with glandular hairs, but have hardly any hairs in their second year. The large, imparipinnate leaves are 40 - 60 cm long and up to 90 cm long in young, vigorously growing trees. They consist of 11 to 17 dark green leaf segments and the leaf margins have shallow serrations. The male flower catkins can be 25 cm long. The flowers appear in May, soon after the leaves emerge. The fruits hang in clusters of up to 20. The husks carry sticky hairs. The nut has a short, pointed tip and a fairly thick membrane where the two halves meet. Grows on almost any soil, as long as fertile. Does need space to develop a good, regular crown.
Our trees can only be planted when they don't have any leaves. Due to the this we will start delivering again from November 2024.
Availability
Clear stem (3) Multi-stem (2)
Size
Root ball size
Packaging
Amount
Delivery period
300/350H,300/400W
Wire rootballed
Available from november! Pre-order now!
Root ball size
Packaging
Wire rootballed
Delivery period
Available from november! Pre-order now!
Stock
Available
350/400H,300/400W
Wire rootballed
Available from november! Pre-order now!
Root ball size
Packaging
Wire rootballed
Delivery period
Available from november! Pre-order now!
Stock
Available
Specifications
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Height
15 - 20 m
Crown
round, half-open crown
Bark and branches
young twigs brown-green, bark light grey with reticulate grooves
Leaf
imparipinnate, 40 - 50 (60) cm, with 11 - 17 leaf segments, elongated to elliptical, 10 - 16 cm, dark green, feathered leaf
Flowers
♀ red flowers in racemes and 10 - 20 cm, ♂ green catkins, 10 - 25 cm, May
Fruits
round to somewhat ovoid, about 3 cm, in clusters of up to 20
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
any, if fertile
Paving
tolerates no paving
Winter hardiness zone
5b (-26,0 to -23,4 °C)
Wind resistance
good
Other resistances
resistant to frost (WH 1 - 6), can withstand wind
Shape
clearstem tree, multi-stem treem
Origin
Japan, Sakhalin
Synonyms
Juglans sieboldiana
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 1st size , taller than 12 metres half-open crown green green orange/red late sprout average growing Feathered leaf non-toxic (usually) Ornamental fruit
Frequently asked questions
Juglans ailantifolia

Juglans ailantifolia can eventually reach a height of 15 - 20 m, depending on the site and climate conditions.

Juglans ailantifolia is average growing and can eventually reach a height of 15 - 20 m, depending on the site and climate conditions.

The right time to plant Juglans ailantifolia is during the dormancy period. In Western Europe, Juglans ailantifolia 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 ailantifolia blooms in may.
General