Dendrobium

The genus Dendrobium includes over 1000 species of deciduous and evergreen (tropical species) that live on other plants and use them as support, rarely land plants. This is one of the most extensive genera of orchids, including many garden hybrids, from long - and thin-stemmed plants to plants with swollen stems, in the form of bulbs. Some species can have up to hundreds of flowers in racemes, while others have only 1-2. The leaves are ovate-oblong, strong, leathery, long-lived; there are loose herbaceous structures that leave traces on the stem after dying off. Individual types they are kept in rooms only during flowering, after which they are removed to a greenhouse or greenhouse, where environmental conditions must correspond to the conditions of natural growth of orchids. Dendrobium densiflorum has square stems in cross-section. Leaves are dark green; drooping dense inflorescences-brushes up to 30 cm long consist of numerous yellow flowers (bright yellow and sepals, and petals) with a bright orange lip (the central lobe of the perianth, unfolded down). The flowers are very fragrant and large. Plants of this type are grown in a hot greenhouse. D. formosum has large, fragrant white flowers with a central orange-yellow spot on the lip. Likes hot greenhouse conditions. D. loddigesii has thin stems and lilac-pink or pink-red flowers, a white lip, a yellow-orange throat and a purple border. It is grown in a hot or warm greenhouse.

The genus Dendrobium includes over 1000 species of deciduous and evergreen (tropical species) that live on other plants and use them as support, rarely land plants. This is one of the most extensive genera of orchids, including many garden hybrids, from long - and thin-stemmed plants to plants with swollen stems, in the form of bulbs. Some species can have up to hundreds of flowers in racemes, while others have only 1-2. The leaves are ovate-oblong, strong, leathery, long-lived; there are loose herbaceous structures that leave traces on the stem after dying off. Individual types they are kept in rooms only during flowering, after which they are removed to a greenhouse or greenhouse, where environmental conditions must correspond to the conditions of natural growth of orchids.

Dendrobium densiflorum has square stems in cross-section. Leaves are dark green; drooping dense inflorescences-brushes up to 30 cm long consist of numerous yellow flowers (bright yellow and sepals, and petals) with a bright orange lip (the central lobe of the perianth, unfolded down). The flowers are very fragrant and large. Plants of this type are grown in a hot greenhouse.

D. formosum has large, fragrant white flowers with a central orange-yellow spot on the lip. Likes hot greenhouse conditions.

D. loddigesii has thin stems and lilac-pink or pink-red flowers, a white lip, a yellow-orange throat and a purple border. It is grown in a hot or warm greenhouse.

Cultivation

The substrate for planting consists of 3 parts of osmund roots and 1 part of sphagnum or 2 parts of osmund, 1 part of peat and 1 part of leaf humus with the addition of draining material (pebbles or shards), as well as pieces of charcoal. Dendrobiums are grown for decoration of winter gardens, offices, for cutting (mainly dendrobium phalaenopsis, D. phalenopsis).

Location

In spring and summer, plants of the genus Dendrobium need a place in partial shade. Since autumn, you need increased illumination.

Temperature

In winter, the minimum temperature is 5 °C when growing plants in a cold greenhouse, 13 °C in a warm one, and 16 °C in a hot one.

Watering

During growth and development and in summer, high humidity is maintained and the soil is often watered. In winter, watering is reduced to a minimum.

Transplant

Transplanted in the spring, using pots slightly larger than the previous ones.

Care

Remove withered flowers and dry or damaged leaves.

Reproduction

Propagate dendrobiums by dividing the bush, air processes and stem cuttings. The bushes that grow after flowering are divided, and the resulting parts are planted in boxes filled with the same substrate that was recommended for cultivation. When new plants begin to form roots, they are transplanted into pots one at a time.

Diseases

Injured stems or leaves may rot; there is gray rot of flowers (if the environmental conditions are not suitable, for example, too wet, poorly ventilated). To prevent diseases, it is enough to thoroughly ventilate the room. Aphids and worms are insects that most often infect the green parts and flowers of these and other orchids. They get rid of them with the help of anti-aphid drugs and anti-coccidal drugs.

Acquisition

In ordinary rooms, it is not easy to create suitable conditions for this orchid, so they often buy the most beautiful cut flowers. However, in modern gardening centers, pots with flowering specimens are also on sale.

Other types The numerous species of the genus Dendrobium described here are among the most cultivated and widespread representatives of orchids. Dendrobium bigibbum exists in various forms and is very common as a cut crop. Flowers with a diameter of 5 cm are painted in a lilac-pink color, with a darker lip. Plants are grown in a hot greenhouse. D. bigibbum phalaenopsis has white flowers with a purplish-pink tint or completely purple, with a darker lip, approximately 7 cm in diameter. Dendrobium vardianum (D. wardianum) is a species with pseudobulbs up to 60 cm long. It is characterized by lanceolate leaves and cup-shaped purplish-white flowers with a white lip and a yellow throat with chestnut and purple speckles. The species is grown in a heated greenhouse. The variety 'White' has completely white flowers with pale yellow yawn. Such an enormous number of varieties and hybrids have been obtained from these orchids that it is not always possible to establish a connection with a botanical species, and each individual cultivar often does not have a name.

Other types

The numerous species of the genus Dendrobium described here are among the most cultivated and widespread representatives of orchids.

Dendrobium bigibbum exists in various forms and is very common as a cut crop. Flowers with a diameter of 5 cm are painted in a lilac-pink color, with a darker lip. Plants are grown in a hot greenhouse.

D. bigibbum phalaenopsis has white flowers with a purplish-pink tint or completely purple, with a darker lip, approximately 7 cm in diameter.

Dendrobium vardianum (D. wardianum) is a species with pseudobulbs up to 60 cm long. It is characterized by lanceolate leaves and cup-shaped purplish-white flowers with a white lip and a yellow throat with chestnut and purple speckles. The species is grown in a heated greenhouse.

The variety 'White' has completely white flowers with pale yellow yawn.

Such an enormous number of varieties and hybrids have been obtained from these orchids that it is not always possible to establish a connection with a botanical species, and each individual cultivar often does not have a name.