OOooff, so now you have a store bought orchid in your possesion. Here's a technique that you may want to try and save it with.
Inspect the roots as soon as possible. Sometimes, to save the plant, the bloom must go. Often times the orchid in a last ditch effort will bloom to try and save it self.
Get some root hormone, liquid or powder and some anti-fungal. Ironically you can find these at the same store where you got the plant..ok get a pair of sharp sciccors and a stream of water going. Get the plant wet, all of it see what roots turn green. Wash all the of medium off do not use again.... The obviouse black, rotten roots have to go. Trim back all the way to the base all the time rinsing the plants. Now inspect the base of it or where the roots enter especially where black roots have. Is the base black ?? the base of the plant is like the heart. clean this area well. After all is trimmed and cleansed, lay the patient down on a water obsorbant item, let it dry a bit. Mix the anti-fungal in a container large enough to cover the plant from the base to the first set of leaves, roots and all. Let the patient soak in it.
*I've soaked Phal.'s for 24 Hrs. at a time.*
Now choose and prep. your medium properly for your growing environment and pot/mount/etc.. Preparing your medium, means washing and soaking it, removing all dusty particles and small bits.
*Here's a head's up, if you soak your medium, first add some root hormone to the water.*
If this plant is strong and not far gone, the roots will attached to the medium like an octopus.
Make ready a spray bottle for a proper mix root hormone solution. Carefully repot/mount your useing stakes, pot pin's, etc. Secure the plant..Orchids like to feel safe. Choose a location with plenty of air flow and slightly lower light exposure. Let it dry until the roots have turned light green or white. Use and continue to alternate between anti-fungal, root hormone and water.
Once roots have begun to re-grow, return to normal feeding cycle and full light exposure.
Aerides Quinquevulnerum *Var. Catayana*