Several years ago someone in California traded with me and I acquired a couple of Mexican Pinguicula, I thought it was pretty nice to have them. One was Pinguicula 'Sethos', misidentified as Pinguicula 'Weser'. I kept it by itself in a ziploc plastic bag clothespinned to a fluorescent light fixture -- it grew well and even bloomed inside the bag. Another was Pinguicula rotundiflora. I struggled for several years, trying to find the conditions where the Pinguicula rotundiflora would grow well. During that adjustment period (for me and the plant), I was able to propagate others from detached leaves. It languished for years, the offsets grew no better than the parent plant. It is a miracle that none of these were lost, most of the time they were hardly larger than the head of a pin. The only success I was having, other than keeping them alive, was when I transplanted them, which I was doing regularly. Finally, I tried regularly spritzing the plant and media with a dilute solution of Peters 20-20-20 with micronutrients. Wow, the plants finally grew, boy did they grow. At last I could see some definition to the leaves. Since then I've adopted many other Pinguicula species, hybrids, and cultivars. These days I'm more confident growing and propagating them, but they can still throw a surprise from time to time.