I got some sphagnum that appeared to have some red coloration, from the wild (I only took a little patch) and after a few months all the red turned to green. it is growing on a windowsill with very bright sunlight, and I am just wondering why it is green. A possibility is that it was growing in a very shaded area in the wild, and maybe it is not used to the sunlight. I don’t think the temperature would be an issue, because the current temp is same as the one in the wild. Maybe, however, it could be seasonal? However, I don’t think this is the case because I saw a big patch of red spagnum in the summer, and in early spring there was also red spagnum. Any ideas as to why the color changes?