Coconut palms thrive in full sun, meaning at least six hours of direct sunlight on most days. Even palms found in nature can struggle in the shade, so it's extremely important that any indoor coconut palm receives ample sunshine. Depending on its placement in your home, consider moving your plant's location throughout the day to "chase" the sun and ensure proper exposure.
During the fall and winter months, consider placing your palm under a grow lamp or another artificial light source to help make up for the loss of sunlight.
Temperature and Humidity
Coconut palms prefer temperatures that are at least 70 degrees Fahrenheit. They grow best in temperatures between 85- and 95-degrees Fahrenheit and they might fail to thrive if the temperature dips below 64 degrees Fahrenheit. High humidity is an important factor, too. Maintain a moist environment for your palm with the addition of an in-room humidifier, as well as frequent spritzing of the plant with warm water. You also can keep the container on a tray of pebbles and water to raise the humidity around the plant. Just make sure the bottom of the container isn't touching the water.
Like many plants that love warmth and humidity, the coconut palm is a thirsty tree. Keep the soil consistently moist but not soggy by saturating it with warm water once or twice a week. Make sure the container does not become waterlogged, as this can result in root rot.