The Croton needs medium to bright direct sunlight.
The soil of your Croton should never stay dry for an extended period of time, but you should let the soil dry between waterings. Water when the top inch of soil has dried out. When watering, water the plant moderately and slowly from above, allowing water to soak through to the roots, then tip out any excess water. Reduce watering during the cold season. Mist the leaves to promote shiny foliage.
Does well at room temperature between 60°F – 77°F. Keep the plant away from drafts and avoid cold temperatures.
Does well at normal (about 40% – 60%) humidity levels.