inexpensive plants that need very high humidity
Okay, I know this sounds like an odd request, but what inexpensive, readily available plants have people found to quickly show damage unless they were kept under very high humidity? Rex begonias seem to do this for me, but they're not exactly cheap or readily available here, and really they've done better with the dryness than I would have expected this winter. I need a plant that really reliably shows its unhappiness with the ambient humidity (actually more than one, hence the inexpensive and readily available parts).
Thanks in advance for any ideas!