Phalaenopsis suddenly turned yellow

[rbarata]

Dp you have a photo of the whole plant, with pot and all?

[lucyc400]

Here’s a picture as it sits.

[estación seca]

I think that's too cold, especially if it was cold and wet. Sometimes they tolerate it, but I would prevent it. I think those leaves are dead and will soon fall off.

[lucyc400]

Thank you. Sadly you are probably right. Always sad to lose a plant.

[estación seca]

Hybrid Phals are warm-growing plants. They would prefer to be above 75 F / 24C at all times, and they thoroughly enjoy it much warmer. People get away with cool winter temperatures but it's risky.

[Nexogen]

The last photo is eloquent, if you kept the plant in the strong sun with cold nights I think she should look like that.

[aliceinwl]

I had this happen to one of mine too. When I pulled back the sheaths of the dropped leaves, the crown had rotted. I think I may have got some water in the crown on the last watering and that combined with the lower temperatures due to the change in seasons lead to rot setting in.

I was surprised since this was one of my indoor Phals and those that I summer outside are getting hit with low 50s (Fahrenheit) at night and are still fine. Cold tolerance seems to vary a lot by background. I have 3 Phals that I never had to bring in last winter: they stood up to lows into the low 40s and high 30s fine while another suffered severe cold damage once temps got below 50.