As I'm not much of a Sarracenia grower (as you can tell from the handle, I'm a Nepenthes afficionado), but I go grow a few species, with mixed results. I've been growing them in a peat/vermiculite mix or pure peat. I know there are different types of peat and some aren't great for Sarras.
Anyway, how well do Sarras grow in pure sphagnum moss? As I used tonnes of it for my Nepenthes, it's an easy medium for me to use. Your thoughts would be greatly appreciated.