I bought this Calathea Vittata May 19. First picture is how she looked that day.
May 21st I decided to repot it in a soil mixture of potting soil, bark and perlite. I have a humidifier next to her and my other calatheas, running around 8 hours a day. Temperature inside the house is around 65 and 73 degrees. They are 10 ft away from a South window. I'm watering her every 4 days with Distilled Water. The last couple of days I've noticed that the leaves are curling as you can see in the pictures.
What else can I do for her? I think I'm losing her.
I'm guessing transplant shock, still adjusting.
A dry soil mix can desiccate feeder roots pretty quickly.
Leaves look dry but the soil looks moist, so maybe the fine roots got mangled a bit?
If it was mine I'd cut back what won't recover to take stress off the plant and re-direct its energy into the fine looking newer leaves, and give it some time. Southern window...bright indirect but not direct? 10' in can still burn.
Long term the lack of minerals in the distilled water might take a toll, but seems too soon for that.
Shotgun approach but hope it helps, hopefully better advice soon.