These have been over a month with me. I read over the net that shedding the yellowish leaves at the bottom are a GOOD sign that the orchid wants to grow further. I'm also going to inform everyone that the orchid is indeed growing new roots from the main stem. It's getting bigger and bigger everyday!
For a Vanda, shedding leaves is a response to stress; ie cold, dehydration, fungus, insect damage. Since it is growing new roots it will probably be fine.
I really hope that everything is all right. Will post some photos after a few days! Will fertilize them soon. Is it okay to feed them every 2-3 days? I just mist them with liquid solution of NPK (20-20-20) and some sea weed extract.
If spraying the fertilizer on works, there's nothing wrong with that. A lot of people do it I think. If the plant it really large, I soak the roots for a while in water first, then pour fertilizer over them. It works fine and they bloom well this way. Every once in a while I soak them with fertilizer and seaweed, even though it uses a lot of fertilizer. If they are in vases, then I fill the vase with fertilizer and water and soak.
New roots. These photos include the 2 shown earlier and another vanda, which was bought the same time as the others. The new roots from the yellowing plant are coming out pretty ok. The other roots are coming on nicely as well. Let me know what you guys think!