Fresh Cut Anthuriums: Anthuriums are long lasting flowers (I just had some at home that lasted over three weeks). To make sure they last, keep the water in the vase fresh by replacing it every three days. When replacing the water, re-cut the stems underwater with sharp a sharp knife or sharp scissors. Also, spritzing the flowers daily with some water will extend their vase life. Keep the flowers at room temperature.
Pre-Potted Anthurium Plants: Keep your anthurium plant in temperatures around 78 and 90 degrees Fahrenheit during the day and around 70 to 75 degrees Fahrenheit at night. Do not allow the plant to frost or freeze. Also, do not put your plant in direct sunlight, as this may burn the flower. Anthurium plants prefer bright in-direct sunlight. When watering your plant, make sure it is watered thoroughly. Before watering again, let the plant dry out, just slightly, and then re-water.