I bought a Darlingtonia californica and a Nepenthes insignis last week and they haven't grown very much. I don't think the Nepenthes has grown at all, and a newly emerging pitcher from the Darlingtonia has grown a little bit, but the hoods on the larger pitcher haven't even puffed up fully. Is it normal for plants to have such shock when newly acquired? I am growing them on a south-facing windowsill and east-facing windowsill, respectively. Admittedly, it has been pretty hot these last couple of days, with temperatures in the 80s even at night. I put a plastic bag over the Nepenthes to help with humidity, but I don't think it is doing anything. I have never seen anything this severe with the species of CPs I have grown, but maybe it is just these genera in particular.
On a related note, how long does it take for the foliage on a dead plant to dry up? My Drosera regia was subjected to severe shock last weekend but its leaves are still green. I'm wondering whether it is still alive or if I should give up on it. It has been five days since the incident.
Short answer: yes. Plants usually take a couple of MONTHS to acclimate to new conditions, in which they will grow very little, if at all, and lose most older leaves or pitchers. You got them last week, expect to be a little more patient with them, especially a finicky plant like Darlingtonia. And if the temps are in the 80's at night, the cobra lily is going to need some sort of artificial cooling, and probably so does the Nepenthes, ESPECIALLY if it's a highland plant. Also, if the regia is still green and the leaves are not wilting, I'm thinking there's probably no issue. It might not grow much for a while, but if the leaves are alive, leave it be. If they had been killed off, they would have wilted immediately, not taken 4 or 5 days to do so.
You've had these plants for ONE week and you aren't seeing rapid new growth? As Hawken said, you need to adjust your expectations and allow the plants a couple of months to settle in to their new conditions. And with night temps in the 80s, you're going to find it seriously challenging to keep Darlingtonia alive. They prefer a significant cool-down at night.
The Darlingtonia is pushing out a new pitcher. The best I can do for cooling now is pouring refrigerated water over it multiple times a day, but I'm going back to southern California in a few weeks so hopefully it doesn't need to put up with it for a long time. I'll move it into a much larger pot too. The Nepenthes is a lowland plant but it hasn't grown at all. I haven't gotten new ones in a long time, so I guess I forgot how slow they are.