So in January I repotted ALL of my Pinguicula and a few other. I use a mix that has a peat:vermiculite: perlite. I don't remember my ratio but, I think I may have used that crummy perlite that Miracle Grow puts out with fertilizers in. I honestly can't remember and I haven't been home to check. However, I have my mom take care of my plants and she has yet to report a decline in any of my plants health. Is it possible that the fertilizer is in such a low concentration that it is not affecting my plants, cause I was reading the labels on the bag at Lowes and the percentages are EXTREMELY low for perlite compared to just normal potting soil.