I recently picked up some fly traps and setup a vivarium for them.
I used a drainage layer and peat moss for substrate (as to not add any nutrients). I expect that they will die back since it’s winter but hopefully they regrow in spring. I would eventually like to add some sundews.
Hello; be sure to use distilled water when needed. Never had a lot of luck with fly traps but did keep a pitcher plant going for a number of years. I also had the wingless fruit flys as food for both the plants and fish.