Hello,
Since the past Fall,i am growing a Paphiopedilum callosum. It was growing very well and the leaf it had half grown when it arrived,grew fine and at a good pace. The a new leaf started developing and at some point,as it was growing out,a solid redish-brown area started revealing itself. It appeared almost like healthy tissue and(after panicking a few days)i thought the problem was over as it was continuing to grow the new leaf fine. Its still(or at least i am sure it was till a few days ago,cant be sure now)growing the new leaf and the new leaf,even the brown area of it,is tough and like healthy tissue,not soft or anything,and the tough leaf epidermis is continuous and not any different on the brown area. I was waiting for the band to finally end and healhty tissue be revealed but still nothing. That didnt worry me too much but today,i noticed the brown spread a bit upwards on the right half of the leaf and that got me really worried.
I have no idea what might have caused this redish-brown area. I think i may have been overwatering it but when i noticed the brown area,i immediately cut down on watering and even left it dry out a couple of time,something i think isnt ideal though either. I noticed the damage spread today,in a period inbetween the waterings and it had a week or more without water and was almost completely dry today before watering it. Its growing by a windowsil receiving reasonable light even with the cloud cover we have been having for a month now. Below the windowsil is a heating element which provides warm and dry but not overly hot, passive air circulation. It doesnt seem negatively effected from lack of humidity and its probably kept more humid from the tray its growing it and the cool of the window and windowsil its sitting on,although insulated by bubble wrap to minimize the cooling.
Here are some pictures:
Why did it got this brown area,what is it caused by and what can i do for it?
Thank you very much in advance!
Brown/tan band on Paphiopedilum callosum's developing leaf
Threaded Mode
