Question
Does too much sun cause brown spots on Stanhopea?  The temperature is hot (New Orleans) but the greenhouse has fans and water system.  Thank you.  P.S.  Is there a was to submit a picture for your review?

Answer
Hello Wendy,

Too much sun probably did not cause brown spots on your Stanhopea, it usually causes the leaves to become light green or even yellowish-green.  The one thing too much sun exposure can do is cause large brown areas (sunburn) on a leaf or leaves.  Small brown spots are usually caused by a fungus or bacterial infection but unless the spots grow larger, they are normally not harmful other than making the leaves look ugly.  

Do you have the greenhouse fans running 24/7?  Constant air movement should prevent or minimize leaf spotting.  Is the Stanhopea in a basket or mesh pot with semi-open sides and bottom?  

Unfortunately, there is no way to include photos in a message on this web site but if you have a photo sharing account on one of the many online sites, you could put the link to your photo in a message and I could try copy/paste it to my browser and view it.  

Hope this helped but if you would like to try sending a link to your photo(s), I'll take a look at it and let you know if I find something other than what I said above.  

Jim Kawasaki
San Jose, Ca.