TS,
My northiana plants are all over the place. In the study room next to tinted window, under T5 lights and at the balcony. I think it is just the season that they are happy with. All plants are pitchering, even for other growers with established plants.
The ones which are in shade pitchers as well as those that receive direct setting sun from 4pm onwards. The main difference is the leaf size and colour. More light, smaller but yellow leaves. I don't see a significant difference in pitcher size but I haven't really compared. When northiana pitchers, it is like wow! so I kinda forget to scrutinise the pitcher size.
Tarence,
Soon there will no longer be a shortage of N. campanulata...hint, hint...