Bog orchids

[Tindomul]

Well, rain fall, how much can that contain other than the stray pollutant. Decomposing matter is usually not a good source of nutrients, as most plant and other organic matter is only partially decomposed, and sphagnum moss replaces many minerals with Hydrogen ions, helping to make the bogs acidic. Perhaps most nutrients come from passing animals who leave feces, rain runoff from surrounding areas, or from the dust from tall plants.
In anycase, if I were to guess on how to care for a bog orchid, it would be sandy, or peaty soil, or constantly wet if not submersed sphagnum moss (preferbly live). Lots of light, and high humidity. With a seasonal cold period.