I have a new Calathea which was hard to find here in the NE and love it immensely. My problem is some yellowing leaves that I'm not sure how to correct. It's a new plant and was exposed to some chilly air between the home and garden store and my home. It's near a humidifier now and an indoor light garden by an east window. Temps can fluctuate being an old building and with old style radiator heat. Any tips are greatly appreciated. I'd hate to lose such a beautiful plant. Thanks. PS: Sometime I tend to be an over waterer... ;-)