The traditional rule is, that transplanting should take place, if with sympodial growing orchids - for example with Cattleya, Laelia, Dendrobium u. a. – the new drive, for example 5 cm long. Recently, however, one transplanted before the shoots develop. The inevitable disturbance usually leads to an inhibition of growth, which can be avoided by early transplanting.
Orchid care beginners – how often advanced – the technique of transplanting causes certain difficulties, mostly in treating the roots. Damage to them is often inevitable; z.T. they have to be shortened. The release from the pots or wooden baskets can usually not be done without using the knife. All adhering residues of old plant material and old roots are shaken out or. cut off, just as shrunken, obsolete bulbs. For orchids with sympodial growth -Cattleya, Laelia, Dendrobium, Odontoglossum, Oncidium and the like – do not leave less than three or more than five bulbs on the plant. The older ones are called back bulges, provided that there are spare eyes capable of driving, brought to renewed development. They are planted in small pots, to initially promote root formation. In the course of 2-3 Years these back bulbs or back pieces regenerate to normal plants. It is a vegetative type of propagation, through which a plant population can be slowly increased.