There is an old saying that no grass in front of the grave is bad. The grass on the grave must be lush, delicate and even. This shows that this place is a good place. If the weeds are overgrown, the branches and leaves are withered, and the east and west sides are bent, it proves that this place can't work.
If there are flowers and plants on the grave, they must be removed in time, otherwise the men at home must wear green hats! No matter how chaste a woman is, she will become unruly and have an affair! There is no grass on the grave of Feng Shui theory, which must be bad. If a piece of grass doesn't grow, it must be barren land, or too acid and alkali.