Hello! I am new to gardening and my new Calathea is developing white and crispy edges! The white is not fuzzy like mold, so not sure what it is. It is in a bright room with west facing windows. I keep out of direct sun but might have gotten a bit for a few days before I learned Calathea does not like direct sun. I keep the room above 60 degrees F and have a humidifier going next to it as it is otherwise cold, dry and snowy outside. What is going wrong? Thank you!
