My "set up" is a south window shaded by a large Kentucky Coffee tree. (This tree species gives the lightest shade of practically any tree.)
Pinguicula ehlersiae - normal growth
One time accidentally, it got a light dose of fertilizer. Immediately I flushed it, but this is the result:
Here you can see a water stressed (lack thereof) plant. You can see how forgiving they can be, as it still can bloom (but doesn't catch bugs)!
Certainly not claiming to be an expert here. I only have one species. I am sure the people at the Carnivorous plant forum are better versed.