To dream of grass represents your feelings about how good or how bad a situation is. Noticing or being aware of how positive or negative some area of your life is. The length or condition of the grass reflects the degree of positivity or negativity that you feel about the situation.
Short or trimmed reflects feelings about how good something you are noticing is. Feeling that a situation is pleasant, beautiful, or being given a lot of attention.
Long or neglected reflects feelings about how bad or negative something you are noticing is. Feeling that a situation is unpleasant, neglected, or getting out of control. You may feel that taking action in some way is important or sorely needed.