Answer: The first step is to cut off the spent flowers and their stems, down to below foliage level. After your plant has rested for a few weeks, it will send up new flowering stalks. Here is some general care information:
Peace lilies (Spathiphyllum floribundum) will grow and flourish in almost any well drained soil. However, it is always the best idea to use a good commercial soil mix containing peat moss, bark and sand.
They prefer bright filtered light, but will survive in low interior light. Peace lilies do best in a warm environment (68-85 degree daytime temperature) with a 10 degree nighttime drop.
Keep your Peace Lilies out of drafts, and never expose them to extended periods below 40 degrees.
Feed your Peace lily every 2-3 months, using a diluted (half strength) well balanced liquid fertilizer such as 20-20-20. You can also use a pelleted timed release fertilizer with caution. Over fertilizing can produce burning of tips and roots.
The soil should be kept moist but never soggy. Allow the soil to dry out slightly between waterings, but excessive drying can make the plant to wilt and cause yellowing of leaves. When watering, it is very important to use room temperature water which has been allowed to sit for 24 hours to allow the chlorine to evaporate. It is a good idea to bottom water.
Cleaning the leaves regularly with a damp cloth to remove dust will not only help the appearance but will also remove some pests which tend to gather on the underside of the leaves and help the plant to 'breathe'. Or, you can simply give your plant an occasional shower with tepid water.
Best wishes with your Peace Lily!
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