The orchids of Ivan Arroyo. My orchids in Basque Country: Tips for cultivating Dendrobium Nobile

Dendrobium Nobile Overview:

Dendorium type nobile are plants with fragrant flowers all along the cane. They are very widespread plants in nurseries but rather difficult to make them bloom indoors. Fresh and bright conditions must be provided in autumn and winter, so refrain from buying it if you can not take them out for a period of the year. They are, however, easily grown if you have a balcony or garden, There are numerous hybrids that have the full range of colors.

Plant morphology: p> Dendrobium type nobile have long pseudobulbs called "canes" and their coriaceous leaves are arranged along these alternately. Roots are abundant when the plant is well cultivated. The plant does not produce floral poles but the flowers are somewhat scattered by groups of two or three along the reed. The flowering is generally scented .

Growing conditions:

Dendrobium nobile likes a strong light. Between November and March: place the plant less than 50 cm from a window with 4 to 6 h.

Between April and October: If it is possible to remove the plant outside after the night temperatures rise from 5-10 °. Avoid the direct sun between 11 and 15h which could burn the leaves, but give it an intense light the rest of the time.

Dendrobium Nobile likes warm to warm conditions during the summer as the new reeds. The ideal summer temperatures are 25 ° C during the day and 20 ° C at night.

During this period of floral induction the ideal temperatures are 15-20º a day and 5-10ºC during the night. Temperatures can vary from these ranges provided that the temperature between day and night is between 8 to 10 ° C. These conditions must be maintained until the first floral buttons appear, under penalty of aborting the flowering (the seedlings, called keikis, then appear at the site of flowers). Once the buttons have been formed you can resume the irrigation and the diluted fertilizer and eventually move the plant to a warmer (but always very clear) site to enjoy flowering.

The irrigations should be When the canes of the year reach their final height, a small terminal leaf appears at its extremity and growth for. The irrigations should then, very spaced and stop with the fertilizer (see the section of initiation to the flowering below). Irrigation and soft manure will not be resumed until the flower buds have formed along the cane.

Over-watering is the easiest way to cause early death to an orchid.

Use green manure at half the doses recommended by the manufacturer with each irrigation during the period of active growth. (development of leaves, roots or flowers). Stop the fertilizer when the new canes reach maturity.

Substrate and Transplant:

When the pot is too small: Transplant at the time of the appearance of new roots in the base the shoots of the year.

Eliminate old canes without leaves when they become too numerous as well as all roots that are not healthy.

Flowering begins with a period of rest at the end of the growth period. If this period of growth is not strictly observed, the flowering will not take place and the plant develops young plants (called keikis) along the cane instead of the flower buds.

respect the period of the ropes that comes after the new canes of the year have finished their growth. It is known that this moment has arrived, when a small single leaf appears on the top of the cane. Once this leaf leaves, rinse the substrate thoroughly with clear, warm water and then stop fertilizing and space the irrigations (the substrate must dry well between irrigation, irrigate only if the new shoots begin to wrinkle exaggeratedly).

Put the plant in full sun (progressively not to burn the leaves) and put cool nights (ideals would be between 7 and 10º between day and night, such as 10ºC at night and 20 ° C during the day). The best strategy is to put the plant outdoors in the rain shelter in autumn so that it benefits from cool, sunny nights.

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Then, to recap, once the canes year have reached maturity, cease with irrigation and fertilizer and put the plant in full sun with a difference of 10 degrees between the temperature of the day and night.

At the end of a few weeks, the floral buttons will appear arranged along the reeds. When the buds have formed well you can move the plant indoors with lots of sunshine and gradually regain the irrigations.

Plants that do not receive enough light can give up to bloom despite a good development of leaves and roots.

Cycle of growth

Spring = Appearance of new canes and roots.

Summer = Growth and maturation of reeds.

Winter = Flowering.

Please note

If the rest period is not respected, keikis (small plants) will appear on reeds instead of flowers.

It is an orchid that can be difficult to make it bloom indoors. It has to be supplied with bright light and cool night temperatures in autumn. As a general rule, do not buy this type of dendrobium if you do not have the possibility to take it out for a part of the year.

The plant should always have a light breeze throughout the year. > Forum tricks (French)

Do not hesitate to take the Dendrodium nobile to the garden (or the balcony) in summer. To put them in a semi-shady place in summer but in full sun in autumn: the temperature difference between day and night, and the increase of the light initiates the flowering.

Dendrobium nobile resist well the cold while the substrate is dry. If they are accustomed to cool nights in early autumn, they can even withstand light frosts. All in all, a lot of eyeball playing with fire: it's wiser to keep them out of frost.

Avoid moving a plant when the buttons are about to open: they can fall easily when crop conditions change abruptly. When you buy a Dendrobium, always make sure you know which group it belongs to (warm or cold).

To know if you need to move it, put it in the same position according to the light. the plant receives enough light, look at the color of the leaves; if they are dark green, the plant does not receive enough light. A well-exposed plant, its leaves are light green and shiny.

With their long reeds, Dendrobium tends to fall easily. You can put the pot in a pebble-weighted pot or in a heavy decorative pot to increase stability.