Personally, I don't feed my CPs anything whatsoever, apart from
the insects that they catch. This includes Drosera, Sarracenia,
Darlingtonia, Cephalotus etc. An exception is some Pinguicula spp.
which I grow in more nutritious soil and feed occasionally.
I don't grow Nepenthes, which I read might benefit from feeding.
I think there is a temptation to want to feed CPs because one
feeds other plants. They grow perfectly well without.
-- Clarke Brunt (clarke@brunt.demon.co.uk)