I love the shape of N. lowii uppers, so last year I traded for a small one. Since everyone mentions how slow it grows, I expected it. However, after reading
this thread, I realized that most people probably do not keep the plants properly hydrated. Once i got my plant, I have attempted to keep the pitchers filled with a super-dilute fertilizer mix and have been rewarded with decent growth (imho) - better than my N. argentii. Time will tell if it continues - but for now, I'm quite happy with the little guy...
John, over
here, has a number of threads with his N. lowii uppers featured prominently (although I see that you posted over there also).