You do have a garage full of plants, Cheryl. I would like to make a couple of suggestions. Use two electric heaters, one at either end of the garage. This prevents one from running too long and is also insurance against one going out during a cold spell. If they can be plugged into sockets on two different breakers, that's even better. Also I would purchase a cheap box fan and run it on low speed 8 hours a day. It uses little electricity. Tropical plants really need that air movement to do their best while in storage.
