The things in your backyard are those that you wish to remain buried in the past.
The neatness of your backyard indicates the balance in your own life. This dream also indicates hardship.
New American Dream Dictionary
2. Childhood, nostalgia.
Little Giant Encyclopedia
My Dream Interpretation
If the yard was messy, weedy or you felt scared, this means that there are hostile influences around you at the moment and you should avoid any changes for the time being.