That brings up a good point. Does Dimension really kill crabgrass in the early stages? Liquid or granular? At what rate? Until crabgrass is one inch long? Two inches tall? Reading the label carefully. "Post emergence control is limited." You must use the higher rate to get post emergence control, 4.1 pounds per thousand(19-2-11) for high cut turf. More, if low cut, not treated last year, or for transition zone. At one point the label says it will work up to 4 weeks after germination. And they say crabgrass is seldom noticed in its early stages. Maybe I can test this.