Directions For Taking Care Of Phalaenopsis Orchids: Temperatures: For Phalaenopsis should usually be above 60 degrees at night, and range between 75 to 85 degree during the day. During several weeks in the fall, in order to initiate flower spikes. Fluctuating temperatures can cause bud drop on plants with buds ready to open. Light: Phalaenopsis grow easily in a bright window, with little or no sun. An east window is ideal in the home.; shaded-south or west windows are acceptable. Artificial lighting is excellent. Usually four fluorescent tubes in one fixture are placed 6'' to 1'' over the leaves, 12 to 16 hours a day, following natural daily length. No shadow should be seen if you hold your hand one foot over the plant's leaves. Water: is especially critical for Phalaenopsis. Because they have no major water-storage organs other than their leaves, they must never completely dry out. Plants should be thoroughly watered and not watered again until nearly dry through the pot. Water only in the morning, so that the leaves are dry by nightfall, to prevent pot from occurring on the leaves. Humidity: is important to Phalaenopsis, the recommended humidity being between 50% to 80%. In the home, set the plants on trays of gravel, partially filled with water, so that the pots never sit in water. Mist the plants in dry climates, or during dry weather, in morning only. Fertilizer: should be applied on a regular schedule, especially if the weather is warm, when the plants are most often growing. Twice a month applications of high-nitrogen fertilizer (30-10-10) are appropriate in warm, humid conditions. Potting: is best done in the spring, after blooming. Phalaenopsis plants must be potted in a well-draining mix, such as fir bark, tree fern, various types of stone, sphagnum moss, or combination of these. Potting is usually done every 1- 3 years.