Repot and rescue Oncidium orchids | Two methods of growing Oncidium orchids | Rescue rootless orchid
Now we can start to replant our Oncidium. First we’re going to introduce a method of rescuing rootless orchids. Last year we used this method to save a rootless Cattleya. We filled this breathable plastic basket with damp moss. Place this plastic planter in a slightly larger glass. Then put the rootless Oncidium on top of the damp moss. Here the glass can store excess water to ensure that the humidity inside the glass remains high. The stone in the glass can separate the plastic pot from direct contact with water. If the plastic pot is in direct contact with water, the moss in the pot will soak in the water, and the wet moss may cause the pseudobulbs to rot. The moss in the plastic pot has good water absorption, which can ensure the humidity around the pseudobulb. With such high humidity and good ventilation, orchids will grow new roots. We put this Oncidium in our sunroom, where the ambient humidity is above 60%.
Next, let's replant our Oncidium in pots. This flower pot is larger than the root system of the Oncidium, so we first put some slightly larger stones into the bottom of the pot. This ensures better drainage and breathability, and also weighs down the pot so it won’t fall over. We chose this terracotta pot beacause it is very breathable. If you use a plastic flower pot, you ought to pierce a few holes around the plastic pot to increase airflow. We mix the bark pieces which we just boiled with some moss and tree fern fiber. This kind of tree fern fiber is difficult to degrade and can increase the drainage and air permeability of the medium in the pot. It is suitable for cultivating epiphytic plants such as orchids. After the medium is mixed, just put the Oncidium in the pot and fill up the pot with the medium.
Finally, we are going to mount the remaining orchids on this maple branch. These orchids already have relatively well-developed aerial roots and are therefore perfect for this cultivation method. This trunk came from a maple tree in our backyard, we cut off a dead branch and saved it to grow orchids. First we put some moss on the trunk, and then place the orchid over it. Once we find a good location, we secure the orchid to the tree trunk with fishing line. When tying, try to fix the rhizomes and pseudobulbs of the Oncidium as much as possible. Don't use too much force, so as not to cut the orchid. You can also place a layer of moss between the fishing line and the orchids to act as a protective buffer. Pile some moss on the base of the orchid and fix it. The moss absorbs and holds water and moisture, which is conducive to the root growth. Finally, we can fix this hook at the top of this branch and then use it to suspend the mounted orchids from the ceiling. These orchids have an extremely annoying climbing habit - they will usually grow upwards and out of their pots, and require frequent repotting because of this. After we mount them on this branch, they can climb their little hearts out!
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