I've been having the unfortunant same problems that FTDude92 is having in this thread. The plants do well, showing signs of recovery from shipping shock and even begin to grow. Then around the 4th or 5th week, begin to go downhill. Blackening traps and leafs and stop growing completely. While the condition seems to be temporary, it usually come out of it after 10-12 weeks, it's got me stumped as to why. So I took some young VFT's and planted some in pure peat, pure LFS, pure sand and pure perlite. The pure sand was the worst. It killed a very young (dime size) VFT within 48 hours, and when I removed the bigger (quarter size) plant, the rhyzome was turning black. I've since put those plants in with the LFS plants.
Has anyone else tried this?