This has been a really helpful discussion! I am currently looking at utilizing the heat mat for some of my orchids as well and have found a lot of useful information here!
I still have one question though (probably a silly one

), hope someone can help me.
So, the question: is there a good way to combine the heat mat with the humidity tray? Will it work if I put the mat under the tray, will the plants get any heat then at all?? Or if I put it above the tray I believe the tray will not give anough humidity to the plants anymore...
Does anyone have any ideas?