Need help with gigantea alba

[Narissa44]

Hello. I've had my gigantea alba for about a year now and it's seemed to be doing decent so far. But I've noticed the edges are yellow and there is a transparent spot. And I was hoping it is from nutrition deficiency and not an infection or rot. Does anyone have a clue on what this could be? Please and thank you. I just got done watering this plant so the moss is wet obviously. It's roots are green and healthy it's just the newest leaf that is concerning me. He's located in my bathroom on the sill of a frosted window. The window never really gets hot but the sun makes it a warm spot. We live in Florida and had a small cold spell for a few weeks. But all my other orchids in the same location are doing fine. And the white powder on the leaves are diatomaceous earth. I don't see any pests or anything.

[estación seca]

Welcome to the Orchid Board.

That could be sun damage. Sun on a leaf can heat the leaf even if the surrounding air is cooler.

It could also be cold damage if that part of the leaf was near the window when it got cold.

[Keysguy]

I'm going with cold damage. Sunburn is typically not on the margins of a leaf.

[Narissa44]

i have a bellina and this one. and they both have the same problem. i purchased my bellina first last year. and around april she had this happen to her tip, so i trimmed it and i havent had it again, until now, which is AFTER i dealt with my gigantea with the same issue. idk whats going on.

---------- Post added at 07:05 PM ---------- Previous post was at 05:46 PM ----------

Originally Posted by estación seca

Welcome to the Orchid Board.

That could be sun damage. Sun on a leaf can heat the leaf even if the surrounding air is cooler.

It could also be cold damage if that part of the leaf was near the window when it got cold.

Maybe... It's just they've been in the same spot ever since I got them. And they went a really long time in the same spot with no damage at all. I made another post with the issue with another plant here. It has more pictures. It's only affecting 2 plants PLEASE HELP! I'm going crazy trying to fix this problem with phal bellina and gigante

[estación seca]

I mentioned a thought in the other thread. Both of those plants are sensitive to cold. Those spots look like cold or heat damage.

[Narissa44]

Originally Posted by estación seca

I mentioned a thought in the other thread. Both of those plants are sensitive to cold. Those spots look like cold or heat damage.

I appreciate it. I hope that's all it is. Thank you for your opinion. I will keep watching them to make sure. I'm just wondering why something similar wouldve happened to the bellina in June when its hot as heck here