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Deutzia - Deutzia

Deutzia - Deutzia


General information

The name of this shrub comes from the Dutch lawyer johann van der Deutz who lived in the eighteenth century. This lawyer financed the naturalist Thunberg's expedition to Japan which discovered the genus.

The deutzia has a shrubby habit. This plant is not an evergreen, in fact, during the spring period it tends to change its color to white. The maximum height that this shrub reaches, in adulthood, is one meter in height. The deuzia has a rounded bearing.

The cultivation of this shrub is very simple as it is a rustic plant and does not have a great need for care. The leaves are green and opposite with serrated edges. The flowering of this plant occurs on the top of the branches. The flowers grouped in panicles can take on the color white, pink or purple. This perennial shrub is native to warm temperate climates, specifically the Far East and Mexico.


The species

The most popular species are:

deuzia crenata which is characterized by its oval and lanceolate leaves with white flowers and the calyx with a thick coat of down.

deuzia.gracilis with lanceolate leaves with toothed edges. The flowers of this plant appear starry and white in color

deuzia scabra particularly appreciated for the white cupped flowers with pinkish hues.


Exposure and climate

Deutzia definitely prefers exposure to direct sun but it must be noted that this shrub absolutely does not disdain partial shade. To have a flowering always at the maximum of expectations, it is necessary not to skimp on the hours of direct exposure to the sun.

Deutzia certainly prefers a temperate climate. In fact, it lives particularly well during the hot seasons but does not tolerate the harsh temperatures below zero at all. Be very careful, therefore, if the plant lives in areas with particularly cold temperatures. It will be necessary to protect the root system from the cold. Proceed with mulching during the early autumn period.


The terrain

For the deutzia the ground is absolutely not a problem. This plant can easily adapt to any type of soil. The only instance that must be fully accepted is drainage. A drained soil promotes a lush growth of deutia.


Fertilization

The spring period is certainly the best time to fertilize the soil of the deutzia. The recommended fertilizer is the slow release granular one. By administering it in a single solution for a maximum period of four months. Alternatively it is very useful to use the liquid fertilizer to be administered put in the watering with a maximum frequency of twenty-five days.


The watering

Watering is not absolutely necessary during the vegetative rest of this perennial plant. Normally the deutzia tends to lose the upper part in cold periods. Particularly appropriate, however, to water this perennial shrub even if occasionally. The best way to water this plant is to inhale a quantity not exceeding about seven hundred centileters of water on a weekly basis.


Pruning and propagation

The propagation of this shrub can take place in two ways: either by seed or by cuttings.

The cutting method is carried out by taking small branches of a length of about ten centimeters to be taken during the summer period

Once the twigs have been taken, they will have to root in a soil composed of peat and sand.

The above is valid for small cuttings if instead you decide to use long cuttings, the situation changes.

First of all, the cutting must be at least forty centimeters and must be taken around October. Planting will take place during the spring.

The pruning of the deutzia, on the other hand, must only take place to facilitate and stimulate the flowering of the following year. It will be necessary to proceed by eliminating the oldest branches. Focusing mainly on the yellowed ones. In this way, new and stronger branches will be born that will stimulate the creation of a very luxuriant flowering


Deutia: Diseases and parasites

Normally the deutzia has the continuous need of antiparasitic and antifungal treatments with a particular warning. Treatments should never coincide with the flowering period.

Since the treatments to be carried out throughout the year, each season will require a different type of disinfection. During the spring, the temperature changes and the particularly abundant rains this shrub will need protection for the numerous fungal species that will target it.

To prevent such an attack, the use of a systemic fungicide is particularly useful and must be used before the buds swell excessively. During the winter period, however, the pitfalls that undermine the life of the deutzia are of a different nature. The pitfalls of winter are aphids and scale insects. In order to prevent these attacks, it will be necessary to use a broad spectrum insecticide.



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