One leaf on cattleya is yellowing

[SakuraDrops]

Hello all,

I bought this cattleya at a workshop in August.
I have not repotted it. It has since had new growth since then, but I am concerned about this leaf turning yellow/brown. Could this mean anything?

Please see photos here: Unsure cattleya - Album on Imgur

Care:
Outdoors under 95% shade cloth
Temperatures vary 85-95F, fans blow on the leaves all day
60% Humidity
Fertilize thoroughly each month, probiotic every 2 weeks
Water every other day, it rains sometimes, and also I will water on consecutive days.

Any help is appreciated , thank you!!

[Roberta]

Looks like it could be sunburn. I would watch to see if the black part expands, but you could just trim it (sterile cutters or single-use single edge razor blade) and dust the cut with cinnamon. It looks like it's developing a sheath.

[SakuraDrops]

Originally Posted by Roberta

Looks like it could be sunburn. I would watch to see if the black part expands, but you could just trim it (sterile cutters or single-use single edge razor blade) and dust the cut with cinnamon. It looks like it's developing a sheath.

Thank you so much Roberta!

[estación seca]

I agree, sunburn. And I don't think it's getting enough water.

[SakuraDrops]

Originally Posted by estación seca

I agree, sunburn. And I don't think it's getting enough water.

Okay, thank you so much! Will up the watering.