Water: Calathea prefer to be slightly moist at all times. Watering lighter, but more frequently (2-3 times/week) tends to work best with these plants. Water requirements may wary depending on the location of the plant in your home, amount of light it receives, etc. It is best to check the soil daily and water lightly when the top layer feels dry. Calatheas are also very picky to chemicals in water. It is best to water using distilled or rain water.
Light: Lots and lots of bright, indirect sunlight. Lower levels of light will lead to stunted growth and muted colours.
Soil: Use an aerated, well draining potting mix.
Humidity: Humidity is crucial in calathea care. Mist leaves regularly, keep near a humidifier, or use a pebble tray to increase humidity. Browning edges and tips on leaves is a sign of low humidity.
Fertilizer: Fertilize once a month with a balanced house plant fertilizer. Do not fertilize during winter.