Most people know that a plant won't grow if it is kept in a dark place. This is because most plants need light to make food through a process known as photosynthesis. The bean plan will germinate and try to find a source of light. If it doesn't, then it will wither and die. However, not all plants need sunlight to grow. Read on from www.ehow.com/info_12129336_plants-stop-growing-complete-darkness.html.