Crotons need bright, indirect light. They do not like unfiltered, direct sunlight, but thrive in dappled sunlight. Vibrant colours depend on bright light so put in some effort to find the perfect place in your house.
A croton knows only two seasons: a warm, rainy growth phase, followed by a cool, dry dormancy period. Keep them evenly moist in the summer and reduce watering in the winter to biweekly but don’t let the soil get completely dry. Mist frequently during the growth period (March to October) to encourage new growths. Humidity, along with the lack of bright light, also affects the colour of the leaves. Keep the humidity level at 40 to 80 percent. If the humidity isn't high enough, the plant may drop some of its leaves. If you have trouble maintaining the humidity in your home at this level, run a humidifier in the room or set a humidity tray beneath the plant and group it with other plants.