Putting it in direct sunlight may fade the color of the bracts. If direct sun cannot be avoided, filter the light with a light shade or sheer curtain. To prolong the bright color of the bracts, daytime temperatures should not exceed 70 degrees Fahrenheit. Don't put your poinsettia near drafts, excessive heat, or dry air from appliances, fire-places, or ventilating ducts.
Poinsettias require moderately moist soil.
Water them thoroughly when the soil surface feels dry to the touch. Never let the potting mixture completely dry out. When watering, take the plant out of its decorative pot or cover and water until water seeps out of the drainage hole, completely saturating the soil. Don't let the poinsettia sit in standing water. This can cause root rot and could kill the plant.