[David]

Ken,

Alcran is correct when he said it needs more sunlight. My echinostoma gets direct evening sunlight from about 3pm onwards. Before 3pm it gets very bright indirect sunlight. It does not pitcher for me when I grew it in a more shaded condition with indirect sunlight for most of the day. After it was shifted to the new area with direct sunlight, it pitchers for me and started growing. This form is very particular about its growing conditions eventhough it is a mirabilis.

Your rafflesiana can acclimatise to lower light levels and in the wild sometimes they grow is dappled or quite shaded areas similar to ampullaria. I have a rafflsiana grown indoors before and it receives only bright indirect light from the window for a couple of months in the year. However it still pitchers for me and the pitchers have good colouration.

However, your truncata will show signs of decline in the next few months if is still does not get direct sunlight. You'll have lots of problems with you truncata like the rust spot you've mentioned. News leaves or pitchers will be smaller or stop growing half way. It would be a good idea to reduce water for your truncata as you've mentioned. I noticed even in growing season, my truncata do not like to be too wet and it prefers a more airy media. This is all the more important now as your truncata is not getting sunlight.