Here is another way in which plants benefit from controlled light. There are three kinds of plants growing in most homes: short day plants, like poinsettias, gardenias and chrysanthemums, which start to form buds only when days become shorter; tuberous begonias, calceolaria and other plants that need long days to flower; and a third group, of which African violets and roses are members, which doesn’t seem to care what the day length is.
Florists use this knowledge to control the light their plants receive and to produce flowers when they are most easily marketable.
To find out just how much light each specific plant should get, use the chart on light requirements. The list of plants serves only as guide; if your favorite plant is not there, try it anyway!
Plants growing under lights need not be left there continuously in order to stay healthy. Plants can come and go without apparent bad effects. You can put them under the lights until they attain desired growth and luxurious foliage or bloom, then take them out and place them where they show to best advantage.
Care To Plant 