Garden

Olmo - Ulmus


GeneralitŠ°


This genus is composed of about 40 species of rustic, deciduous trees, suitable for parks and large gardens, very long-lived. The elm, in spring, develops roundish fruits in samara.
It is a very widespread plant in Europe and in Italy there are some monumental trees belonging to this variety. These trees can reach 20 meters in height; they have oval leaves that change color in relation to seasonality. The flowers are not very decorative and appear during the winter or the beginning of the spring season.

Cultivation techniques



These trees are planted at the beginning of autumn or at the end of winter, in a sunny position; they adapt to any type of terrain and do not require particular cultivation attention to be able to develop at their best. They are used both as single specimens and as elements to compose rows.
It is good to place the specimens in areas where they can receive some hours of direct solar radiation; they do not fear the cold and therefore can be placed in the ground even in areas where the winter temperatures are rather harsh.
The soil preferred by this kind of trees is however the fertile one, rich in organic substances and, above all well drained, since the formation of water stagnations can cause root rot and the onset of very dangerous fungal diseases for the development of this type of tree.

Multiplication



The multiplication of this variety of plants can take place by detaching the basal shoots, which must be cultivated at least for a couple of years in the nursery before they can be planted; or otherwise through offshoots: the offshoots of the elm must be prepared in September-October, removed after about two years and then planted.
To get the best results it is good to proceed with the practices for multiplication during the spring or autumn season.

Parasites and Diseases


elm leaves are often attacked by aphids, even lepidoptera larvae can cause serious damage by eating a large part of the foliage. Sometimes the elms are attacked by lignivorous mushrooms. Fungal diseases are the most dangerous, because, if not countered with timeliness, they can cause very serious damage that can seriously compromise the plant.

Ulmus carpinifolia



This variety is an ornamental tree that exceeds ten meters in height, widespread in Europe, northern Africa and western Asia. Leaves oblong, toothed, dark green, which turn yellow in autumn.

U. Sarniensis



This type of Ulmus is widespread in Western Europe, exceeding ten meters in height. It has obovate, glabrous and glossy leaves, dark green. The Aurea variety has young yellow leaves, which become light green in summer.

U. Glabra



This is a variety that reaches even twenty meters in height, very common in Europe; it has an oval crown, and obovate toothed leaves at the edges. The Camperdownii variety has a roundish crown, while the Exoniensis has a columnar crown.

Olmo: U. procera, sin. U. campestris



this is a variety of elm widespread in Europe, reaching 10-20 m in height. Dark green ovate leaves, which turn yellow in autumn.