Pervillei and madagascariensis are both plants which need hot temperatures by day.
Around 30°/35° by day, and around 25° by night is appreciated by this madagascariensis.
Even if the plants are growing by the sea, plants are often found in
some peat areas. The sphagnum is growing only on surface.
The humidity is not quite so high. At 08h30am, i recorded only 37% of humidity. Night is not too high, with around 75%. but the wind is present.
Important fact i think, the wind is really important for those 2 species, pervillei and madagascariensis. Every areas where you can find those nepenthes, there are exposed to the wind. and sun all the day long. Full south.
very high light intensity is really important in culture i think, low humdity, high tempertaures and air... Not so easy in fact for terrarium culture, but really interesting plants and graceful indeed.
Kina.