Question
Hi guys.  I live in Portland, OR.  I have a room with bright southern and eastern light that has no direct connection to heat or ac.  Any heat during the winter is ambient heat from the rest of my apartment so it's always a little cooler in the winter and little warmer in summer compared to the rest of my apartment. I think this room would be perfect for highland Nepenthes.  It gets the cool nights they need,  and days too in the winter but never freezes.  The summer days can get warm but never extremely hot for extended periods of time.  Nights are cool especially if I keep the window open.  I have in mind Aristolochioides, Gymnaphora, Ventricosa x Ampullaria and Droseras Regia and possibly Binata.  Point me in the right direction if I'm not on the right track, guys.  I'd love to hear of what other plants might do well in a room like this. I have the patience for slow growers. It's kind of a cross between a greenhouse and a sunroom.
Thanks!

Answer
Hi Alexander,

Be very careful about taking the cool nights concept too far.  While mountainous plants will appreciate cool nights, they also need warm days.  That's very critical for proper growth.  The temperature should always go above 70癋 during the day.  Mountainous tropical plants still need warm temperatures for optimal photosynthesis. If the temperature is constantly cool your plants will be severely stunted and develop a lot of brown spots.  Those brown spots are cellular die off from lack of photosynthesis due to cool daytime temperatures.

The only species that will tolerate these constantly cool conditions is Drosera binata (all subspecies).  It'll just go dormant for the winter and emerge when the temperature warms up again.

You should also avoid N. ventricosa x ampullaria.  This hybrid, while tolerant of cool nights, grows best with warm nights.  

If you can heat the room for proper daytime temperatures, any of the other plants you've listed will be fine.

Good growing!
Jacob Farin