Phalaenopsis (fayl-eh-NOP-siss) plants with long-lasting sprays of lovely mothlike blooms in a broad array of colors are inexpensive and widely available, ready to give weeks of pleasure in your home or office. Simply provide modest light and consistent moisture, and they will delight you with their relative ease of culture. Flowering season is late winter into spring, though commercial growers today can make flowering phalaenopsis available year round. Light:  Sufficient light is important for healthy growth and flower production.Provide bright light, no direct sun. In the home, and East, West or shaded South window. Foliage should be medium olive-green. Dark green, limp foliage indicates too little light. Temperature:  Mature phalaenopsis need a 15 to 20 degrees F difference between light and day. Provide nights of 60 to 65 degrees. Days of 70 to 85 degrees F. Seedlings need temperatures five to ten degrees higher than mature plants. Water:  Mature plants should seldom dry out completely between wateriness. Phalaenopsis need 60 to 70 percent humidity. To increase humidity in the home, place on trays of moistened pebbles or mist plant daily with distilled water from an atomizer bottle. Fertilizer:   Should be provided on a regular basis because most potting media have none. We recommend Peters brand water-soluble food for orchids 10-10-10 or 12-12-12. It can be found at Home Depot, Ace or Tru Value hardware and at most garden centers. NEVER fertilize an orchid that is in bloom. Potting:  Should be done every 12-24 months before the substrate breaks down too far. This is best done in the late spring after the main flowering season, using a well-drained but water retentive mix such as sphagnum moss or coconut bark. Select the new pot size by the root mass, and not by the top size.