Alnus glutinosa 'Imperialis' – Alnus glutinosa 'Imperialis'

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Betulaceae

Alnus glutinosa 'Imperialis' – Alnus glutinosa 'Imperialis'

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Grows from shrub into a graceful, average-sized tree. The growth is slow and it takes very long before it gets a real tree shape. Therefore it is less suitable for avenues and streets. The alternate leaf remains smaller than of the species, it is deeply cut and the entire lobes are linear. In autumn it remains long on the tree. The stalked buds and the young twigs are sticky to the touch (glutinosa = sticky). Female flowers are inconspicuous, male flowers come in brown yellow 7 cm long catkins. The strobiles appear from September onward and remain long on the tree. Besides a decorative leaf, the tree also has a fine habit with drooping twigs. The tree roots strongly with a branching main root. Poor tolerance to hard surfaces.
Availability
Clear stem (2)
Specifications
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Height
6 - 10 (12) m
Width
4-6m
Crown
wide pyramidal, half-open crown
Bark and branches
young twigs purple grey, trunk later grey and fissured
Leaf
very delicate, deeply cut, green, 3 - 8 cm
Flowers
catkins, ♂ brown yellow, ♀ oval, March/April
Fruits
ovate strobiles
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
moist to wet, not too poor
Soil moisture
suitable for wet soil, withstand short flood, withstand long flood
Paving
tolerates no paving
Winter hardiness zone
3 (-40,0 to -24,5 °C)
Wind resistance
good
Other resistances
resistant to frost (WH 1 - 6), can withstand wind, resistant to de-icing salt
Application
coastal areas, industrial areas
Shape
clearstem tree, multi-stem treem
Origin
unknown, before 1859
Clear stem tree Multi-stem tree acid soil clay soil loamy soil nutrient-poor soil peaty soil sandy soil tolerates no paving resistant to de-icing salt resistant to frost (WH 1 - 6) suitable for wet soil withstand long flood withstand short flood can withstand wind broad conical 2nd size, between 6 and 12 metres half-open crown green yellow March average growing Conspicuous bloom non-toxic (usually) Ornamental fruit
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Frequently asked questions
Alnus glutinosa 'Imperialis'

Alnus glutinosa 'Imperialis' can eventually reach a height of 6 - 10 (12) m, depending on the site and climate conditions.

Alnus glutinosa 'Imperialis' is average growing and can eventually reach a height of 6 - 10 (12) m, depending on the site and climate conditions.

The right time to plant Alnus glutinosa 'Imperialis' is during the dormancy period. In Western Europe, Alnus glutinosa 'Imperialis' 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.

Alnus glutinosa 'Imperialis' blooms in march.
General