Pleurothallis schiedei mature leaves are yellowing and dropping!

[tedeelee]

Hi all- I am very concerned as I have had my pleurothallis schiedei for 4 years and i has been a great grower. In fact, it hasn’t stopped flowering continuously for 2 years. I remounted it with just sphagum moss on a stick (same kind of mounting it was on before the previous stick got too old) and I thought it was doing fine as it was still flowering and I still see a couple fresh roots.. BUT the past couple months, it’s mature leaves green/yellowing have been dropping! They are not even dried out, they are still fat leaves.. and I don’t see any black or white spots. Can someone please check the pictures and give me some advice?! TIA

[estación seca]

Welcome to the Orchid Board!

These generally need high humidity and always-moist medium. Different species have different temperature and light requirements. Did something change more recently? Did you move it to a different spot? What are the day/night temperature, humidity and light in your growing area?