Low Land Neps

I'm pretty sure that I had a thread like this last time, but I couldn't find it on the search.

Are there any easy to keep Lowland Neps that I could grow outside?

I currently have :
N. rafflesiana
N. X Miranda
N. X Ventrata
N. X Ted Payne
N. truncata
N. mirabilis 'pink'
N. ampullaria x ventricosa

x hookeriana, gricilis, albomarginata...a bunch.
Alex