Answer: They do thrive in full sun so the south facing window sounds good, but being located near a radiator is tough on most plants. If possible, move it elsewhere. They are native to Cuba, so thrive on humidity. Try increasing the humidity around it with pans of water or setting it on a tray of pebbles with water, to evaporate around it. All plants have a period of dormancy when they don't put out much new growth, usually perking up again towards late winter/early spring. Hope this helps!
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