Robinia viscosa – Viscous Robinia, Clammy locust

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Fabaceae

Robinia viscosa – Viscous Robinia, Clammy locust

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Grows to heights of 12 m in its natural habitat, usually just to 8 m when cultivated. The tree has a rounded to broad ovoid crown. The many sticky parts are the most remarkable. The brownish red twigs have no thorns but are covered thickly with sticky glandular hairs. The imparipinnate leaves consist of 11 - 21 leaf segments. They are ovoid with a pointed top and are 2 - 5 cm long. They are dark green and smooth on top, and on the bottom they have grey hairs and are slightly sticky. The dark red leaf stems are also sticky. The remontant flowering starts in June and can continue into August. Light pink flowers appear in long clusters up to approx. 10 cm long. The flowers have no scent. Flat pods follow in the autumn. These are 4 - 8 cm long and covered thickly with sticky glandular hairs.

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Specifications
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Height
6 - 10 (12) m
Width
6-10m
Crown
broad ovoid, half-open crown
Bark and branches
grey, rough grooves, brownish red twigs, very sticky
Leaf
imparipinnate, with 11 - 21 leaf segments, green, 2 - 5 cm, feathered leaf
Flowers
tight clusters of light pink flowers, June/July
Fruits
flat pod, dark brown, very hairy, sticky, 4 - 8 cm
Spines/thorns
Yes
Toxicity
has toxic components
Soil type
places little demands on soil, provided there is good drainage
Soil moisture
suitable for dry soil
Paving
tolerates paving
Winter hardiness zone
5a (-28,8 to -26,1 °C)
Wind resistance
sensitive
Other resistances
resistant to frost (WH 1 - 6), resistant to de-icing salt
Fauna tree
valuable for bees (honey plant)
Application
industrial areas
Shape
clearstem tree, multi-stem treem
Origin
eastern and south-eastern USA
Clear stem tree Multi-stem tree calcareous soil clay soil loamy soil nutrient-poor soil sandy soil tolerates paving light-loving resistant to de-icing salt resistant to frost (WH 1 - 6) suitable for dry soil broad ovoid 2nd size, between 6 and 12 metres half-open crown green pink June average growing Conspicuous bloom Feathered leaf valuable for bees (honey plant) toxic components yes Tree for the future
Frequently asked questions
Robinia viscosa

Robinia viscosa can eventually reach a height of 6 - 10 (12) m, depending on the site and climate conditions.

Robinia viscosa 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 Robinia viscosa is during the dormancy period. In Western Europe, Robinia viscosa 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.

Robinia viscosa blooms in june.
General