I will take a look in the greenhouse again today and see what I come up with. I'm sorry to hear about the problem with the plants upon arrival and would have liked to know about it back then. In order to follow up with our plant packers we need the feedback to we can figure out what went wrong. Regarding the spider mites, I really must say that I find it very hard to believe. Please understand that it is not because we are above having pests in the greenhouse, but rather because of what spider mites need to grow and thrive. Are you calling your customer a liar?
Spider mites need dry air in order to do well and are much more common in indoor grown plants. Our greenhouse is so moist and humid that they are honestly the one pest we never see. Your customers do though.
The only pest we sometimes have an issue with is scale and that is treated on an as-needed basis because it is not too common in there either. And apparently spider mites.
There are actually a few other things that can cause spotting on leaves and some species of Nepenthes, i.e. sibuyanensis, are prone to developing spots for reasons we have yet to determine. Spider mites are usually a good cause.
We suspect it could be insufficient light. I have intense lighting and my Miranda has never produced a single green leaf.
In any case, we would notice such things as we don't just have a "move 'em in and move 'em out type of operation. Yes you do
.Spider mites also spin very noticeable webs that often cover the back of leaves and are hard to miss. Yep, they definitely were.
Put a plant on an open windowsill in average room conditions and I can almost guarantee they will pop up pretty quickly! Too bad they're in a sealed closet in a 2nd floor bedroom opposite the window. They can't tolerate moisture but apparently can apparate?