Hongrui, that's exactly what I want to hear! That the species don't do well in direct sunlight...I don't have the photoperiod here at my balcony for VFTs and Sarracenias so you are a bearer of good news.
Now that Hongrui mentioned it, the ones directly under my T5 lights are slower than those further away. Hmmm...time to experiment and investigate...
Btw, what mix are you all using? Mine's just silica sand with about 20-25% peat.
David, I am as new as you to this species. I think maybe Khoas can help too 'cos D. hartmeyerorum is found in Australia.
I forgot to add...I have the plants in peat/sand covered loosely to maintain the humidity because they are quite near to the lights. The others which are further away which are not potted up, are left on perlite. I'll show a couple of photos later.