Conventional wisdom has it that soil fertilization is dangerous for carnivorous plants. A grower may get away with it once or twice with great results but the next time wipe out their whole collection. I have seen this on a small scale with volunteers at the University of California, Davis, Botanical Conservatory multiple times. At first the plants are truly stunning. Give them one treatment too many or at the wrong time and all the plants die. We are talking hundreds of plants.