Yes, Swords you may have hit a nail here. Yes, I am growing it in a greenhouse, but it is wintertime and there are shorter light hours. However, I have installed 2 fluorescent bulbs inside the greenhouse and I am started to see a difference. I am getting other hybrids pitchering much quicker, My plastic cover is solarweave 20% shade but the green house receives about 6 hours of indirect light plus 3 of direct light and 8 hours of fluorescent lights which overlap with the others.
the leaves on the ventricosa look very healthy and bright green. I have yet to see pitchers. Something similar happened to my N. tobaica.
The facts mentioned above are shared by other ventricosa growers in temperate climates where the temperature at night does not go below 50 F during Winter. Then I would like to ask you all the following:
If N. Lowii, N. hamata, macrophylla do very well at these temperatures at night, why ventricosa which is considered a highland does not??. Maybe we may have to reclassify ventricosa as an intermediate not as a highland!!. Just a thought.
Gus