Here is a pic. of some Phals taken in Vietnam.
Sorry, not my pic. so i do not know what the potting material is but the general rule is as you go towards the tropics use a coarse well drained potting material.
Perhaps you need to place the plants in fairly heavy shade till the plants show evidence of recovery by growing new leaves and roots.
{{gwi:156009}}

Sadly the answer is: hardly ever. Here's my method for a 20% shot. Remove all the dead material. Put some small pebbles in the bottom of a large glass jar. Add about a dessert spoon of sterile water. No medium. Seal the jar. After a couple of days the water should have evaporated and provide 100% humidity. The jar should "fog up" but there should be no water in the bottom. Drop the rootless plant in, reseal, keep out of direct sunlight, then wait a long time and hope..... Good luck - Ian.

RE: stinimarini

How long did your plant take to reach this recovered stage?
The leaves of my phals are all droopy now except for the top 2.

I wonder if it works if I take the spray bottle and spray at the roots every 2 days. They are now completely medium-free. I have them either hanging or resting on the medium.

It depends on how severe the rot is. I remove the rotted roots repot it in the smallest pot it will fit in with spagnum moss, just enough water to keep the media damp, no fertilizer and eventually new roots start to appear but its a fifty, fifty situation. Keep out of direct light. Good luck.

I had an orchid that had only two viable roots left, and they were very short. It had 8 leaves when it got sick, and because it could no longer support them, all except two fell off. As more roots grew back and the plant got stronger, it put out more leaves (small ones at first), and now it has 7. I kept it in bark/charcoal mix to help maintain humidity, and I misted the root area every 2-3 days, because it had no other way of taking in water. I have read suggestions to place a clear plastic bag over the plant to keep it humid, but I disagree with this theory: orchids need air flow. This was two years ago, and I believe that this plant is finally back to the same condition it was before it got sick.

I'm trying to do the same with another that was given as a gift, it was like yours: rotten in moss. I'm not having the same luck, but I'm still trying.

Good luck to you!

I seem to have a phalaenopsis that recoverd once n now it has it again this is a problem was i packed the medium to tight n have the wrong type of pot its ceramic. I have cut the rotted roots of and put ver lose moss n bark I need to put it back in the same pot so its being held up with a stick is this ok till I can buy the right kind of pot?