How did you grow the orchid?
It looks like you are growing it in water. For a beginner, that is not advisable. Vanda roots require a significant amount of air. If you water frequently enough and the relative humidity is moderate to high, then you shouldn't have to worry too much about desiccation.
The use of full water culture, (FWC), in my opinion, is not necessary for growing Vandas. I think that FWC is something best left to try when you become a bit more advanced in skill set. I believe that right now, it is best to focus on the basics. Perhaps when you become more comfortable with understanding the fundamentals of orchid growing, then you may try using FWC as a possible technique.
As a disclaimer, FWC may not work well in all cases.
In the case of Vandas, it is usually better to underwater than to overwater. If you underwater, at least you have the luxury of providing more. If you overwater, then you get the rots coming in that destroy the plants.
The large majority of rots are not primarily caused by disease organisms. In the majority of cases, disease organisms are a secondary occurrence due to the plant's immune system being compromised as a result of improper cultural practices, which in turn causes the plants to stress out severely.
It might still be salvageable considering that there are still living roots. However, do not go overboard with the watering again, or you will most definitely lose the entire plant. If you are considering salvaging the plant, just know that realistically, it could take up to anywhere around 10 years for the plant to fully recover from such a devastating situation.
I had an Ascocentrum (Vanda) miniatum that had lost 5 - 6 leaves until it only had 2 remaining. It took up to 1 year to produce 1 new leaf. Now, I have a total of 3 leaves.
Recovering Vandas from such a loss is possible if a clump of tissue in the center of the root mass (called meristematic tissue) is still alive. Meristematic tissue is the plant equivalent of an animal's stem cells. Meristematic tissue are made up of generalized plant cells that can become more specialized plant cells.
1st and foremost you must get your cultural conditions correct. If it is not corrected, you will continue to run into the same problems repeatedly.
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Philip
Last edited by King_of_orchid_growing:); 10-06-2018 at 06:09 PM..
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