One of the most common dreams is that you have a green yard, which is not necessarily a bad sign. It may mean that you are flourishing and successful in your work by having a green yard. Everything you worked on is well maintained and immaculate.
A dream with a brown yard is often a dream about something that the dreamer is struggling with such as self-esteem or anxiety. The color of the yard may also indicate what type of emotion the dreamer is feeling about themselves. Your state of neglect is starting to show on the surface level.