Found this on the underside of several of the leaves on my Bhut X PDN plant. The plant is healthy and it is also unique as it is a normal green looking plant where as the other two are purple with purple stems. It looks like some sort of salt residue to me. I cut off a leaf and put it in a sealed bag and I isolated the plant just in case they are eggs. None of my other 136 plants have anything like this. Any ideas what it could be?
EDIT: Went back and double checked. I did find it on several other plants.
EDIT: Went back and double checked. I did find it on several other plants.