I lost 7-year-old Darlingtonias this year in the middle of summer and I am almost certain it fell under attack by a root rot pathogen. I suspect Pythium, Fusarium, or Phytophora. I am in Georgia, but this year had a great deal of cloudy weather, low-ish temperatures, and 90-100% humidity for almost 3 solid months. Completely abnormal. Anyway, the greenhouse I had them in contained only Arabidopsis and research plants, and all fell under attack at the same time. I had the Arabidopsis lab-analyzed, but not the Darlingtonia, and Fusarium and possibly Pythium were reported. Cleary's 3336, Subdue Maxx, and Banrot were what I used and it alleviated problems with the Arabidopsis. The Darlingtonias were too far gone to save, however, probably because I kept the soil much wetter and the pathogens spread more quickly. However, the green tissues that were left when I fungicided seemed to die more slowly than in weeks previous. I suspect I found the cure, but much too late. If I can get ahold of more Darlingtonias I'd love to trial them again. They easily were taking 90 degree summer days last year with seemingly no problems. Hopefully soon I can get some nice trades organized.