As a response to Crissytal's thread, here are some pics which show how fast sundews can grow when fed. I grow these indoors in the winter, so normally they don't catch anything on their own.
First off, here is a link to a page I made documenting the growth of D. dielsiana over 2 months:
And now for some before-and-after picures
Capensis 'Albino' and 'Red' root cuttings when fed (granted they're fast growers already)
20 days later-
D. venusta from root cuttings were slow, but took off like crazy when fed-
4 months old from root cuttings-
2.5 months later- they're forming flower stalks (which I cut)