Especially in winter, you can buy increasingly high numbers of Dendrobium. It is quite easy to grow them and even grow flowers if all factors for flowering are given. However the challange is that Dendrobium needs a strict rest period with less or no water at all as well as fall in temperatures. If you do not obeserve these factors, they grow layers instead of flowers.
Therefore it is very important to know “which” Dendrobium you have and the exact requirements concerning water and temperature. If you want to grow Dendrobium, please buy a good book for orchids or browse the www.
Most commercially traded Dendrobium are:
Dendrobium phalaenopsis hybrids
Dendrobuim nobile hybrids
Dendrobium kingianum (fragrant orchids)
It is well worth to grow a lot of natural kinds such as Dendrobium thyrsiflorum or Dendrobium nobile. When necessary, you can multiply them by seperation (vegetative breeding) when repotting because Dendrobium are sympodial plants (horizontal growing). Please ensure that you have at least 4 pseudobulbs per piece to guarantee quick growing.
About 1500 species of Dendrobium are existing and their habitat is the tropics but there are significant differences in altitudes (from Himalaya region to the low lands of the rain forrests). This is also the reason why they have special flowering requirements (temperature, water).
Dendrobium grow in all three temperature ranges and their requirements vary in season:
– warm for example Dendrobium phalaenopsis
– medium temperature for example Dendrobium thyrsiflorum, Dendrobium nobile, Dendrobium nobile hybrids
– cool for example Dendrobium nobile (only winter)
According to your possibilities in temperature variation you should choose the corresponding Dendrobium to avoid failure.
Dendrobium needs more light than Phalaenopsis or Lady’s Slippers. This especially applies to flowering times and bud formation. Therefore please observe the following rule: as bright as possible but no direct sun at all. The brighter it is(please be aware of direct sunlight) the more careful you have to be that it does not get too hot. Please ensure both: a sufficient cooling by movement of the air and an adequate amount of water.
Humidity should be at least 60 percent of relative humidity. Dendrobium likes to get sprayed in the morning with soft water which has room temperature. Please make sure that the plant will be dry again until the evening to avoid pathogenic germs such as fungus.
Movement of the air
In nature you will always find air movement. A slight wind is always blowing but it is very different in a room. Often there is no air circulation which leads to unregular heat distribution especially in winter when all windows are closed. Therefore, during the whole year, a fan is best suited to move and mix the air. We recommend fans from the American based company Vornado. It is sufficient to have them run 15 Minutes per hour (in winter) and 15 Minutes per 90 Minutes (in summer).
Together with movement of the air, fresh air is very important to ensure a adequate level of carbon dioxide for photosynthesis. However there should be no draught at all!
Water and fertiliser
If they grow new bulbs, please ensure a sufficient water and fertiliser supply. At the end of bulb maturity (they reached their maximum size and get thick), please reduce the water amount slightly (Dendrobium phalaenopsis) or completely (Dendrobium nobile) to avoid growing a new bulb and to encourage flower formation.
For Dendrobium nobile, please do not water at all from autumn and put them in a cool place until all buds are mature in early spring. The bulbs should not shrink – if this happens, temperature is too high.
Dendrobium is easy to water from below however at the beginning (refer to our recommondations) after repotting them into the Orchitop, you should water them from above so that the small roots do not moulder and they can get used to the new conditions. You will find our recommondations for watering here
Please use a commercially traded fertiliser from April to September and read the dosage instruction carefully.
These recommondations have been assembled conscience based on our longstanding experiences. Please really see them as recommondations, because it is your responsibility to take steps according to the individual requirements of your orchids and maybe even depart from our recommondations. We are happy about suggestions to improve our recommondations.
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