That's interesting about using coffee - I'll have to keep that in mind! I've got a few neps, and I've done what Peter D'Amato recommends in his book which is to give them ( yeah, it's nasty! ) crushed snails...it does work! After a month, or so big pitchers on established plants began to pop off and you know I had to look down in there - just a mass of debris at the bottom!
A Warning...If you have orchids or any other tender plants nearby - once the snail wasn't crushed, and it managed to crawl OUT of the pitcher and land on some beautiful cattleya flowers..
So before you feed them, smack that sucker on the pavement to break the shell and it should sink like a rock! I know this sounds beyond nasty, but I'm telling you, and I've done that this summer with a big N. maxima superba I saved from a local nursery - the pitchers that followed were huge
Has anyone else done this or do I need to sign up for therapy?