Ailanthus altissima – Tree of heaven

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Simaroubaceae

Ailanthus altissima – Tree of heaven

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A tree with stout branching and a robust look. When the maximum height of 25 m has been attained, the tree has a spread of circa 15 m. Especially in its early years the growth is strong. The leaf is odd-pinnate, but often the tip leaf is absent, which makes it pinnate. The maximum length is 60 cm and it consists of 12 to 25 leaflets and appears late in spring. When bruised it spreads an unpleasant odour. The unisexual, green white flowers appear in large panicles and are followed by winged fruits (keys) that turn from light green to pink red. The trees are nearly always dioecious. Even on the worst and driest sites the tree survives, the growth rate however, is slower. In China, in the past also in France, used for breeding silkworms.

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Specifications
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Height
10 - 25 m , fast growing
Crown
round to spherical, open , half-open crown
Bark and branches
bark is light grey with shallow light brown fissures
Leaf
(odd-) pinnate, dull green, up to 60 cm, feathered leaf
Flowers
green white in panicles, June/August
Fruits
yellow green to pink red
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
few requirements, can be used in hard surfaces
Soil moisture
suitable for dry soil
Paving
tolerates paving
Winter hardiness zone
6 (-23,3 to -17,8 °C)
Wind resistance
moderate
Other resistances
resistant to frost (WH 1 - 6), resistant to de-icing salt
Fauna tree
valuable for bees (honey plant), valuable for butterflies
Application
avenues and broad streets, industrial areas
Origin
China, Korea
Synonyms
Ailanthus glandulosa
acid soil clay soil loamy soil nutrient-poor soil peaty soil sandy soil tolerates paving light-loving resistant to de-icing salt resistant to frost (WH 1 - 6) suitable for dry soil 1st size , taller than 12 metres half-open crown green late sprout fast growing Feathered leaf valuable for bees (honey plant) valuable for butterflies non-toxic (usually) Tree for the future
Related projects
Grolsch Veste - Enschede
Frequently asked questions
Ailanthus altissima

Ailanthus altissima can eventually reach a height of 10 - 25 m , fast growing, depending on the site and climate conditions.

Ailanthus altissima is fast growing and can eventually reach a height of 10 - 25 m , fast growing, depending on the site and climate conditions.

The right time to plant Ailanthus altissima is during the dormancy period. In Western Europe, Ailanthus altissima 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.

Ailanthus altissima blooms in june.
General