Watering:
Only when the soil is dry two inches down do they require frequent misting and watering. The soil must be kept moist.
Fertilizer:
Apply any organic fertilizer once or twice during the growing season.
Re-potting:
Repotting Calathea Dottie can be quite delicate, so you should only attempt it when it is really required and the plant needs it, such as when the roots become pot-bound or the plant appears to be outgrowing its container.
Temperature:
Keep them in a bright space with no direct sunlight.