I've noticed for several weeks that the oldest leaf on this Dend phal has very slowly started to discolor. It even looks more wrinkled that it had before. It was looking blotchy at first, more like some of the green in the leaf thinned out. It has progressed enough that it shows up on camera. Before it was so slight that light coming from behind the leaf was needed to see the spottiness. Its starting to turn to light green and I'm guessing will eventually be yellow.
I took it out of it's pot. It was in a bark mix. I soaked the roots in water for 10 minutes. Trimmed off some that I thought were dead. Sprinkled with root hormone. I put the Dend in a new pot and just lightly put some sphagnum around it to prop it up. It will not stay in the moss. I just have to get some new bark mix. The stuff I had seems like it got moist from sitting in the bag.
I know eventually these ones will lose older leaves. I don't know if this is normal or if this is a sign of a problem or trauma. When the leaves yellowed and dropped on my other orchids they didn't look like this. So I want to make sure to confirm if this is normal or not.