I bought two nepenthes recently, I've been told that they are nepenthes ventrata, they are still small, I'm getting concerned because some of the leaves and pitchers are turning brownish, is it normal? I place them outdoor as I have no space to put them indoor, is it ok? I live in auckland new zealand, winter time has passed here, the temperature is rising up but it is still pretty cold at night, the day time temperature is around 18 to 24c, and night time temperature is around 15 to 9c, could the cold snap at night be the reason?? I water them three times a week and I make sure that the moss is always moist, they get around 3 hours of sunlight on sunny day at 50% shaded area, the rainfall frequency in Auckland is high, it's rare to get sunny days here. Appreciate comments from experts out there, thank you so much!