Robinia Viscosa


Clammy locust (Robinia viscosa) is a deciduous tree that grows up to 13 metres tall at a medium rate. It’s hardy and grows in zone 3. The flowers are pink and are produced from May to June. They have both male and female organs and are pollinated by insects.

Robinia Viscosa prefers sandy, loamy and clay soils and requires well drained soils. It can tolerate nutrionally poor soils. This tree perfers acid, neutral and alkaline soils. It thrives in semi shade or no shade in ligh woodland. Clummy locust will grow in dry or moist soil and can tolerate drought and atmospheric pollution. This tree or any of its parts are not edible. There are also none known medicinal uses of this tree.

Clummy locust is used in other properties such as soil stabilization on banks and wood, which is heavy and close grained. This tree poduces and extensive suckering root system which can grow as far as 80 metres from the tree. Clummy locust is a really hardy species because it tolerates temperatures to at least -25 degrees C. It’s considered a fast growing tree but it’s a relatively short lived species in the wild, living less than 100 years old. The branches are brittle and prone to wind damage. Pruning should be done in late summer.

Photo By: Pauline Eccles

Robinia Viscosa is hardy species and is resistant to honey fungus and some soil bacterias. It also fixes atmospheric nitrogen and is used by other plants which are growing nearby. Clummy locust is propagated by seeds. The seeds can be stored fro over 10 years. They need to be soaked in warm water for 48 hours during late winter. After it germinated, seedlings should be planted in individual pots in greenhouse for their first winter. Then, they can be planted outside into their permanent positions the following summer.

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