Plants need light to grow so that the process of photosynthesis can occur. This process, found only in plants, converts solar energy into sustenance for plants. A substance found in plants known as chlorophyll converts light into carbohydrates, which becomes food for the plant.
A plant kept in a place where there is no light or sun whatsoever withers and dies. A plant must have some sort of light or sun in order to grow. A plant also requires water and warmth to germinate and grow. Some plants do need more or less light than others in order to grow properly. There are typically instructions on a plant that a gardener should read prior to planting. Some different levels of sunlight include deep or dense shade, partial shade, light shade, part sun and full sun.
Some plants burn if planted in complete sunlight, and all they require is a shaded area in order to prosper. If the colors of a plant are washed out and it is dry, it is most likely receiving too much sun. If growth is sparse and the plant seems to be leaning toward a light source, it needs more sunlight. Fluorescent grow lights are also an option for those that cannot place a plant outdoors. The process of photosynthesis is still able to occur under this type of light.