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With this name, sorbus, we refer to a large group of deciduous trees and shrubs, generally rustic, originating in Europe and Asia. They have smooth, greyish bark; the shoots are generally pubescent; the leaves are pinnate, bright green and become red in autumn, before falling. In spring this kind of tree produces small white flowers, gathered in bunches; at the beginning of autumn they are replaced by numerous bright red berries, which, depending on the species, can also be orange, pink or white; for example, S. cashmiriana produces pink flowers and white berries, which remain on the plant even after the leaves have fallen.
The fruits of this type of tree are edible and are also used for making jams or liqueurs.
Sorb is a type of tree that needs a sunny, well-ventilated place; it does not fear the cold, but can suffer damage during the hot summer months, so it is advisable to place it in partial shade if we live in a place characterized by very hot summers.
However, it requires a few hours of direct sunlight a day to be able to develop at its best. It can be grown without problems even in areas where the winter temperature is particularly rigid.
The rowan does not need large amounts of water, usually the rains are sufficient; if the summer months are too dry we recommend supplying water every 5-7 days.
In fact, this type of plant also grows spontaneously in hilly areas and has a rather rustic and resistant structure.
In autumn and spring it is advisable to bury mature organic fertilizer at the foot of the tree. Even when a new rowan tree is planted, it is good to bury it in the chosen place of the granular fertilizer, which will allow the plant to have all the necessary nourishment.
As for the youngest specimens, instead, it is good to intervene with greater regularity, supplying them with a greater quantity of water, given that they are more subject to temperature changes and need more care to obtain the best development.
This kind of plant grows without problems in a loose, well-drained soil, rich in slightly acid organic matter. The soil preferred by the rowan is the calcareous one but being a rustic plant, it is well suited also to soils that are not congenial to it.
In order to obtain new plants of this variety, in spring, seeds extracted from berries can be sown, preserved throughout the winter in a cool, dry place, even if desired in the refrigerator, layered in the sand. It is also possible to practice semi-woody cuttings.
The new shoots will have to be rooted for some time in the container, before being finally decanted.
Sorbus: Pests and diseases
this plant is sometimes affected by bacterial fire. the rowan is however a rustic plant, resistant and that easily adapts to the different locations; for this reason, it does not come, generally affected by pests and diseases. Obviously, it can be damaged by the intervention of the birds that feed on its berries.