Spino di Giuda - Gleditsia triacanthos


Gleditsia triacanthos, also known as Spino di Giuda, is a medium-sized tree with deciduous leaves originating in the United States; they have a rather long life, but not more than 100-150 years, the adult specimens can reach 10-15 m of height, even if they often remain smaller, above all due to pruning. They have wide and vaporous crown, the stem is very branched and often the branches have a disorderly and twisted course. The bark is gray-brownish and presents numerous thorns, both on the stem and on the branches; there are varieties without thorns. The leaves are pinnate-composed, consisting of 15-30 small green oval leaflets; in late spring it produces numerous inflorescences consisting of small greenish-white little flowers; in summer the flowers give way to the fruits: long, semi-woody, red-brown pods, which contain many dark seeds. This plant resistant to wind and salt is often used for street trees near the sea.


To obtain the best results in the development of Gleditsia triacanthos it is advisable to plant it there spino di giuda in a sunny place, or in partial shade. It does not fear the cold, even if the young specimens are preferably placed in the spring, so that they are already developed and acclimatized to the arrival of the cold.
It is a plant that adapts well to the harsh climate and also to polluted areas or where salt is present. It has spread to areas up to 500 meters above sea level.


As far as the water supply is concerned, it is good to remember that generally the Gleditsia triacanthos are satisfied with the rains, tolerating the summer drought without problems.
The youngest specimens may need more water, especially during the hottest and dryest periods in order to develop at their best.
In spring it is good to supply the plant with a fertilizer rich in nitrogen, in the form of well-mature manure, or granular fertilizer so as to provide all the nutrients necessary for better development.


The thorn tree of Giuda loves loose and well-drained soils, even very poor or sandy. it has a good rusticity and for this reason it is able to adapt in situations that are not congenial to it. However, it is advisable to check that at the base of the plant water stagnation does not form which could be harmful to the plant.


The multiplication of the thorn of Judas generally occurs by seed, since the plant produces it in quantity, often tending to self-seed; in spring it is also possible to practice semi-woody cuttings. Despite being a resistant plant, the cuttings are planted in the spring to allow the plant to develop before the cold season.

Spino di Giuda - Gleditsia triacanthos: Parasites and diseases

The Gleditsia triacanthos is often affected by mites and by larvae miners, which ruin the leaves, but generally the parasites do not cause irreparable damage to the plant. When you notice the signs of the presence of parasites it is advisable to intervene promptly with specific antiparasitic products that allow to effectively counteract the destructive action.