for the majority...so do its parentsMedusa gives a lot of people trouble.
#1 rule in growing CPs: persistance and patience.
if you keep your nep in ONE place and you dont move it around. or transplant it or anything else like that. it will grow. my very first nepenthes was N. x ventrata. its supposedly the easiest. but i constantly changed growing conditions and repotted at least 3 times in 2 months. it never grew pitchers but grew leaves. so. i put it outside in a place that it only gets morning sun. after about 2-3 weeks it was making a pitcher but then a storm came along...i wont get into that my problem was constant change of conditions and right kind of light. what kind of lights do you use, Sam? i wanted my first Nep to be N. medusa. but i read up on it and i figured it wasnt the best to start with. so i got N. ventrata.