My dendrobium has a red blush on the underside of the otherwise healthy looking green leaves, but in odd patterns that remind me of a "farmer's tan" (well-tanned below the short sleeves, white above the sleeves).
The top of the leaves still look green with NO red.
Please see the pics.
dendrobium red & green underside.jpg
The underside of my dendrobium has tan lines!
dendrobium red & green underside2.jpg
Mottled, splotchy red blush.
It looks to me that the portions of the leaves that are reddish are the parts that are the most shaded, that may not get any direct light hitting them. I have light coming from multiple CFLs above and from the side, as well as a bit of light from an east-facing window (it has been quite cloudy in the Northwest lately).
Is this a problem/harmful? What causes this? What should I do about it?
I have seen references to this in other posts, but I can not seem to find them using the search function ... so sorry if this is redundant.
