I saw this post in the Pinguicula section, and I was curious how long you've been growing P. corsica? I lost a bunch of them this winter (which has been crazy warm) and was hoping you may have some techniques that are working well for you. I also have lots of P. grandiflora and few other temperate butterworts.
Thank-you for the responses. I think I narrowed down the problem to them being too wet. I had some trays flood, and our winter was very warm. Those two things together made them rot. It seems that P. grandiflora can tolerate being much wetter than P. corsica.
Have either of you grown these plant in an alkaline media? I've started adding dolomite lime to the media (peat/sand/perlite), and the plant don't look any different in the alkaline media, but they seem to hold up better over time.
Likely the plants will be happier with pH above 7. Grandiflora can grow in peaty soils, while most species prefer sandier or rockier substrate.
It would be so nice to start a new political party. Maybe name it, The Tea Party II for Americans, not racist anti-American douches that hate their neighbors? We need to reform our politics, not make them more partisan and dumber.