So I have a couple of nepenthes, but is feel that I can't reasonably provide the temperature drops they want, being that it will start to get too warm at night for nature to provide it for them anymore (highlander hybrid and ventricosa). So I was hoping to perhaps get a very small, portable indoor greenhouse or terrarium like container which is temperature controlled. While I did find some stuff on the internet, it was all for keeping stuff warm, none seemed to be good for cooling stuff down to the extent I would need.
Any advice guys, for those who don't have any outdoor stuff but still have indoor highlander nepenthes? How would you keep them cool? And don't say refrigerator, they won't fit and my mom would have a fit, and they are a bit too cold anyways. I thought of ice packs, but am concerned that they will contaminate the soil somehow. Freezing DI water and placing the cubes on the soil has crossed my mind, but I don't know if I could use enough to cool the plant without overwatering it.