It is normal for older leaves to die. Photo doesn't show the newest leaves which would help diagnosis.

Where are you in the world? Where is the plant? What are the conditions like there?

Light, Temperature and how often do you water your orchid?

Example mine are near a window, gets filtered sun in winter.

Current Temperate 27.3C Humidity 69% (it is summer here)

Hi Arthurm2015!

Please see a few more pictures of the entire Orchid plants. There are two of them. The first one only has one leave (left) beginning to wrinkle and turn yellowish. It didn't bloom for years. Nothing has been sprouting off it but it's alive. The second one has been growing flowers about twice a year. They are both inside the house. The second one is closer to the window, as you can see the sun is partially heating it. I live in Los Angeles. In the house is cold right now so we are running heater on and off. Thank you!

It might help us if you take a close up of the roots too. I'm thinking you are not hydrating the roots long enough and or using fresh water. The roots sticking into the pot look very deydrated, dead.

Do you fertilize that plant too?

After seeing both sets of pics, I'd say it is normal die-off of lower leaves. Both plants look fairly healthy in my opinion.

I would suggest that you turn the leaning one occasionally to try to help it grow straighter/more vertical. It is also needing repotting because it needs to be 'buried' up to the first set of leaves, plus based on the large gap between media and first leaf, I'd say the media is several years old anyhow.

A far as the one in the clay/brown pot, as long as the new leaves are larger than the previous ones (it looks that way), it is OK.

The purple color on the leaves of the leaning one is a good sign that it is getting plenty of light, I assume it is the one that blooms. Maybe get the one in the clay pot a little more light and it may bloom also.

Good luck,

Bob

Thank you All! Yes, it's probably time for repotting. I am using water from the faucet.. wrong? Once in a while I spray with Mircale Gro Orchid plan food mist. I don't use any other fertilizer... Please advise.

I think your problem has to do with thorough watering. When you water it, do you submerge it up to the rim in water and let it absorb for about 1/2 hour? About once a week or so? If not and you are just top watering you are not hydrating the roots as Mike said and your plant will start to sacrifice lower leaves eventually dying.

I wouldn't fertilize until you get better growth going on. But you should water by total soaking.

If you repot make sure you trim off all dead roots and after repotting (I use 1/2 spahgnum moss totally mixed with small orchid bark) use the soak water method. Rosie