I had one for about 4 years that got really huge - hung down at least 4ft. from its pot and had great big pitchers. Then I moved it to where it was getting watered with my irrigation water from the well, and it didn't like that one bit. It's still hanging there but it is dead as a doornail.
I now have another that I keep in the pool cage to attract any stray mosquitoes that get in. I've had it for a year or so and have been very careful to always water it with only rain water. It does get a spray with orchid fertilizer once in a while, but a very light spray.
My thinking is that they're really sensitive to water quality.
