I have three species that have never pitchered in my care. Densiflora, spectabillis, and macfarlandi all have never pitchered for me. The spectabillis and macfarlandi grow outside during the summer with day temperatures of 80 and 70% humidity. During the night the temperature is 60 with humidity at 70%. The densiflora has similar day conditions but the temperature is 45 at night with the humidity at 50%. Does anybody else have difficulty getting these species to pitcher? Even my hamata pitchers in these conditions. Are these species best left to a greenhouse?