Actually, i was reporting on successfully growing N. gracilis in water. (Hydroponically was a bit inaccurate, as there was no substrate. Perhaps emmersed is the proper word.) If you look at the link you can see the roots that formed during the time it was growing in water. It was in only water for more than 9 months.
Obviously any highland species would rot with this treatment, but i imagine there are other lowland species indigenous to swampy areas that would probably do nearly as well. I'm tempted to try it with a cutting from my N. mirabilis echinostoma, as i think it hails from such habitat, as well.
There are some advantages to growing in water, assuming the plant will tolerate it. No soil-borne pests, less chance of drought, no need for guessing at a mix for the soil. And, it seems to enhance pitcher size- i imagine that the complete lack of nutrients in the substrate encourages large pitchers to compensate. I will try putting micronutrients into the water next time to see how this effects the growth and pitcher formation.
So, anyone else try this? I think someone else had mentioned it awhile back.