Thanks, Trent. I was not clear enough in my previous post about Marc's way of growing N. campanulata. He is growing them under lights and not outside. He used to lose them earlier on when he grew them outdoors but not anymore, now that they are under florescent lights.
Thanks, schloaty. My balcony where I grow the N. campanulata under lights doesn't go beyond 95F but stays over 90F for the entire year during the day. The nights are in the 80s. Recently, the weather's been gloomy and the days are in the high 80s, with nights in the high 70s. The plants are putting out larger and better leaves now which is why I thought it could be the cooler temperatures that helped. A cold day here is 75F. LOL
I put one of the smaller plant at the balcony recently for some natural light and the growing tip got fried a little. Now, it is putting out another leaf and I'll see how it goes. The sky has been overcast but there are a few days of good light throughout the week so I feel that this would be a good time to acclimatise the plant. It has been under florescent lights ever since it arrived from Borneo Exotics. My first campanulata is from Malesiana Tropicals and it took 2 years to recover from flowering as a 3" plant. It has been under artificial light all this while.