This Calathea ornata plant has seen better days; initially I think I was overwatering it due to a suggestion that it constantly likes to be "wet," and it was too far from light - about 20 feet from a wide floor-to-ceiling window.
I've since moved it - I keep it in a windowsill and move it a few feet away for the 3 hours a day that direct sunlight comes through the window. We don't have hard water but I've been using filtered water just in case. I wait until the top half inch of soil is dry before watering again.
Is this plant recoverable? If so, where would I expect to see signs of improvement? A new stem coming up from the base? A new offshoot of an existing stem? If I am reading correctly I believe the current leaves won't regain any of their color, though they could stop losing it.