Ash - Fraxinus excelsior

Ash - Fraxinus excelsior

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The genus Fraxinus has about a dozen deciduous trees and shrubs, originating in Europe, from Asia and from North America; F. excelsior is a tree native to Europe, which in nature reaches 25-30 m in height; has compound leaves, consisting of 9-13 small oval leaves, dark green, which become golden yellow in autumn, before falling. At the beginning of spring, before emitting the leaves, it produces small whitish, inconspicuous flowers, followed by samare with a paper consistency; The trunk is erect, very branched, with dark and cracked bark even in fairly young specimens, to which it gives an ancient appearance, which greatly benefits the aesthetics of bonsai. F. latifolia, a native of North America, produces small yellowish flowers in spring, has bright green leaves. This plant is particularly suitable for the formal upright style, with two trunks or windswept; generally it is not recommended for beginners, because it is not always easy to obtain leaves of appropriate size, and due to the vigorous growth of the plant, which generally allows only the setting of large or giant bonsai.

Pruning, exposure and watering

Pruning: pruning of the crown is usually done in autumn, or at the end of winter; for the whole vegetative period, from March to September, the buds are clipped: after they have produced at least 4-5 leaves, they are cut leaving one or two leaves. In the same period it is possible to set the branches using the metal wire.
Exposure: the ash is an outdoor bonsai, which does not fear the cold, although it is advisable to repair the plants in the coldest months of the year, using tnt. Place the pot in a sunny place, or in partial shade, taking care to shade the plant from late spring until the summer, to avoid excessive insolation.
Watering: from March to September water regularly, leaving the soil to dry almost completely between one watering and another; in the hottest months of the year it is good to remember to water often, to prevent the ground bread from drying too much. At the beginning of the vegetative period, fertilize with nitrogen-rich fertilizers; at the end of summer fertilize with phosphorus-rich fertilizers, at least every 20-25 days.

Ash - Fraxinus excelsior: Other tips

Soil: the ideal soil for ash trees is made up of a part of tobra, a part of sand and three parts of clay; these plants grow quite quickly, producing a large root system, so it is good to repot the young specimens every two years, at the end of winter, or at the beginning of spring, before the vegetative restart. The specimens of many years are repotted every 4-5 years.
Pests and diseases: these plants generally do not undergo massive pest attack; plants cultivated with bonsai may, however, suffer the infestation of aphids, mites and cochineal.