TERRICCIO PER ORCHIDEE DA 12 LT
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Evergreen ones need a short rest period; deciduous ones, at the end of flowering, need to stay cool and dry. Let’s see one for each type, so as to present some typical characteristics of these orchids.
D. Agregatum is a variety native to Asia. Evergreen plant with pseudobulbs up to seven centimetres long, erect and bunched. It produces solitary leaves from each pseudobulb, leathery and rigid. The wide flowers with golden yellow tepals, perfumed of honey, bloom in spring.
D.Devonianum is a variety native to Asia. It is a deciduous plant with pseudobulbs similar to stems, often branched, pendulous. The leaves are linear lanceolate. The flowers are cream-white with a shade of pink and internal purple-red tepals at the apex, white labellum with the apex or purple margin. They are grouped individually or in groups of two at the nodes of the peduncle. They bloom in spring – summer.
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- The noble Dendrobium is a perennial plant belonging to the family of Orchidaceae and groups together countless varieties that differ in that their size can vary from 30 to 30 cm.
Given the vast number of species belonging to this genus, it is not always easy to understand how to take care of your orchid. For this reason we have proceeded to make a subclassification of these plants, based on the main characteristics of the different varieties, dividing the genus into six groups.
These groups have been formed taking as reference the fact that the specimens were evergreen or with deciduous leaves and in relation to environmental needs, if the plant needs a warm climate or a cool environment. In this way it is possible to have more precise references as far as the good cultivation is concerned.
As mentioned, this type of orchid may have different needs depending on the type of variety. It is possible, however, to give some general information to understand how to proceed to obtain good blooms.
Orchids that require a warm climate need to be placed in a bright environment but not exposed to direct sunlight which can easily cause burns on the leaves. The original varieties from the cooler areas, on the other hand, need to be placed in semi-shaded areas with good air circulation.
Watering, both for terricolous and epiphytic species, must be regular and constant, but with the care to always verify that the soil or substrate does not allow the stagnation of water, which can quickly lead to the onset of root rot.
The terrestrial plants are to be planted in a fertile soil, light and rich of humus, whilst the epiphytic ones, that is those which, in the wild, grow up leaning against the bark of the alters, require a specific compound formed by sphagnum, crushed bark and material such as perlite or clay, capable to lighten and to avoid the stagnation.
In order to have healthy and luxuriant plants, it is necessary to guarantee to the plants a correct degree of humidity, which is a relevant factor for the health of every orchid. During the hottest days it is therefore essential to proceed with vaporization of non calcareous water on the leaves, so as to ensure the ideal climate and lower the temperature.
It is also good to provide regular fertilization to provide the right nutrition, mixing the appropriate fertilizer with the water of the watering.
Also for repotting it is necessary to know which variety the orchid belongs to, but it is good to know that the roots are rather fragile and delicate, so they must be wetted before proceeding with the operation. The substrate degrades with time, so it must be replaced to have good support.
Dendrobium orchids – Dendrobium: Diseases and pests
Dendrobium orchids can present different problems related to nutritional deficiencies, incorrect environmental conditions, excessive watering or attack by pests.
In the case in which they are exposed to the direct rays of the sun, they can easily present burns on the leaves, if they do not develop the flowers, often, the problem is to be found in the fact that they are placed in a poorly illuminated place. Root rot or leaf loss are symptoms of excess water.
The parasites that can affect these plants are cochineals, aphids and mites. They can be countered with special products, to be used in moderation, vaporizing them on the leaves. In the case of cochineals it is possible to eliminate them manually with a cloth with alcohol, while for the red spider, a mite, it may be sufficient to increase the ambient humidity.