It would be helpful to know more about sundew, a picture maybe or the variety, the green house and light situation and the area you live but I can work with this. Your purple pitcher can handle lower temps than anything else. Keep wet when actively growing. Needs bright light(full sun) to color up well. The sundew may be forming hybernacula which means it could be going dormant. Hybernacula help to protect the plant from harsh environments. Depending on the plant and location, it may need to be inside by now. It's good that the vft eats but it could be well on it's way to dormancy. This plant also needs full sun to color up well. Keep wet when growing actively. The nepenthes depending on your location should probably be inside. It's getting too cold in most of the northern hemisphere to keep them outside and that may also be too much sun. Nepenthes does not observe dormancy as it is tropical and needs to be kept fairly warm. Most nepenthes don't like wet feet. Never let any of your plants go dry but let the trays dry between watering if the plants are going dormant. When they are dormant just keep the soil damp like a wrung out sponge. Only use rain, distilled or RO water. Tap water with a low PPM of TDS can also be used.
There is lots more information here and doing a search for each plant will give you an almost never ending source for good reading and information. If you still have questions after doing the search then come back and ask. Most of the info I have given you is probably here somewhere but felt it was the most important stuff. Ok I'm rambling. Good luck and happy growing.

Thank You very much I'll get some pictures up for you soon of the Sundew and I live in Florida!