I got three N. spathulata crosses about two months ago and have been growing them in a spare greenhouse at school. They have been growing well and have increased leaf size, but all of the pitchers have aborted. Conditions are full sun, day temps: 70-75, night temps 50-55, moderate humidity(probably somewhere between 50-60%). I think the problem may be the photoperiod. I live quite far north, and right now I only get 7 hours of daylight. Could this be the reason for my lack of pitchers?