Just as the physical earth is made up of past events—the trees and leaves, the plants and creatures that have lived and crumbled into the dust of the soil—so the earth of your dream represents the past on which your present depends and your future is built. Therefore, digging into it will tend to uncover things—most often feelings—you have buried there from your past. The earth is also your mother. It represents the soil, the genetic material, and the background from which you have sprung. It is the womb of the past from which you are born. In other words, it is both the physical material from which things grow as well as the overall environment in which something new can grow.
So if you are digging in your dream, is there something you need to learn about your past? Or is there something you want to find out, a vital piece of information that will complete the picture? If you are uncovering an object or old bones, then you are probably becoming conscious of long buried memories and feelings from your past.
If you are trying to bury something, what are you trying to cover up or hide in waking life? Bear in mind the expressions associated with digging, too. Is someone having a dig at you in waking life? Did your dream reflect your entrenched, firmly held opinions? Or was your unconscious urging you to adopt a more down-to-earth approach? If you are a gardener, you will know that although the earth is the giver of sustenance, security and new life, each life cycle also has an end, so when earth figures in a dream, it may also indicate the end of a phase in life and the beginning of a new one
A dream about digging, watering or feeding the earth may therefore suggest your desire to begin a new phase. It could also depict your fear of unpalatable hidden truths being exposed in waking life. Anything growing from the earth in your dream shows something that has developed from the possibilities of your life, and who you are.
If your dream depicted you planting a seed, try to make a connection with your waking life. The dream seeds may refer to the planting of an intellectual or creative concept that has the potential to grow if placed in fertile ground and cared for. Then again, planting dreams may refer to your thoughts about starting a family. A dream of healthy crops may suggest that your waking ventures or family are flourishing.
If what you are taking from the earth is vegetables or things to eat, these are the fruits of your past efforts, and suggest benefits arising in your life. If, however, the earth in your dream is barren and nothing is growing, this could indicate that you are emotionally and physically exhausted by the demands of waking life.... The Element Encyclopedia
If you dream that one object, plant, animal, or person grows disproportionately, its symbolic value will increase in proportion to its size. Instead, if it is you who grows, your situation could improve soon.... The Big Dictionary of Dreams