Question: Orchids

I recently bought two orchids, one bears the name Phalaenopsis, the other "Star Class Dendrobium", and looks like the plant of the photo I send in an attachment.
I have no idea how to grow them: water, repotting, pruning, fertilizing ...
Can you help me?

Orchids: Question: Orchids

Dear Alberto,
Thank you for contacting us about the questions about your Orchids, via the Expert's section of. A large group of plants and hybrids whose origins are predominantly tropical belong to the Orchidaceae family. In order to grow appropriately, these plants require the environmental conditions of the country of origin. Numerous varieties (about 35) belong to the Phalenopsis species originating from India, the Philippines and northern Australia. They are epiphytic plants, they live on another plant as support, evergreens, they require the environmental conditions of the original territory to offer the best aesthetic-ornamental replies. The plant is composed of a short stem, fleshy and broad leaves arranged in 2 rows. It has aerial roots that stick to the sides of the vase. The inflorescences are lateral, pendulous with flowers of various shapes and many colors that can be severed and preserved for a long time. They are grown on portions of bark, with the rhizome wrapped in soil, in warm and humid positions. The minimum survival temperature is 15 ° C. The plant is at rest in the period November March and in this period the soil is kept only humid. During the period of activity it is fertilized regularly every 15-20 days and watered more. It is repotted in March every 2-3 years. The fall of flower buds, is very frequent on these plants and is due to various disorders including thermal-hygrometric changes, nutritional deficiencies. It should be noted that these plants do not tolerate the presence of ethylene in the air (gas produced also from ripe fruits such as bananas and apples) as it easily promotes the detachment of flowers and therefore among other warnings it is advisable to keep them away from areas with fruits in conservation.
To favor a regular flowering this plant needs a lot of light in the vegetative phase to have the stimulus to emit the flowers ... The plant survives outside and can be in direct contact with the sun when it is not in bloom. Requires daily spraying with fresh water and weekly fertilization. When the flowers sprout you need to repair the plant from the sun's rays so as not to damage the flowers.
For all the orchids it is advisable to eliminate the withered flowers also taking the peduncle, proceeding with the normal cultivation operations of fertilization and nebulization.
Dendrobium is a genus that has about a thousand species, spread from the Himalayas to Japan to the Indonesian islands up to Australia. All the Dendrobium have in common the curious characteristic of being able to emit new jets (called keiki) from any node of the stem as well as from the base as it normally should be. All Dendrobiums want good light (no direct sun) and good air circulation. They love frequent fertilization but only in the period of growth (spring-summer). The temperature in winter must not fall below 13 ° C, the waterings must be frequent during the summer and in the period of growth, almost nil in winter. In summer it is good to place the vase over a saucer full of well-wet gravel to maintain a high level of humidity. Check the plants very often, as they are very prone to the attacks of red spider mites and cochineal.