#1, gloxinias are bulbs. They bloom, die down, and come back.
#2, everything you named needs more sun than you're able to give it.
#3, 70 degrees is not warm enough for these plants, especially sitting
in front of a window, where it is probably much colder, and they're
getting drafts.
#4, Last, but not least, propane is death to gesneriads.


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