Calathea plants will thrive in a well-lit spot without direct sunlight, although a small amount of daily sun is good (avoid mid-afternoon sun). Too much direct sunlight may cause the leaves to loose its markings.
Water twice weekly in spring and summer or when soil is dry and reduce in the winter to every 7-10 days. Do not overwater.
Calathea require humid conditions, keep your plant on a wet pebble tray or mist daily.
Give your plant food every two weeks in summer and half during winter months.
Calathea plants also like their leaves to be wiped with a damp cloth to rid them of dust.