Phalaenopsis bellina - leaf tips darkening, turning yellow, spreading down leaf

[nheidar]

Does anyone have the answer to this question? I have the same problem:



I recently got a compot of two Phal bellina. They were both in the same little 2 inch pot in sphag, so same conditions.

Unfortunately, one of the phals started to lose one or two of its leaves a couple days after I brought it home, but I didn't think much of it because they were bottom leaves. The way it happens is the leaf slowly starts to yellow from the tip, and it spreads until the entire leaf is dead. Today it lost its last full leaf (one remains that is about halfway mature).

Its roots are very hardy and green (which is also why I originally thought nothing of it losing leaves). There are no other signs of stress, no spots, nothing else that I can think of or see. The other phal is doing great with new roots on the way and very quick growth.

In an attempt to discover if there is an issue with the deeper roots, I unpotted it; but there is nothing wrong with it. [FYI: I put it in its own pot with hydroton in s/h -- I understand that this may cause extra stress, but I just did it anyway in hopes that something different would be a good thing, since its original conditions were not doing it any good.]

Does anyone know how I can salvage this bellina, or what is wrong with it?

These pictures were taken a few days ago, before the last yellow leaf fell off.

Thanks,

Natasha