Luis from San Antonio, Tx writes
Hi-Yield Weed and Grass Stopper with Dimension Herbicide can be applied from late summer through early fall (late August through November). When applied in the fall, a sequential or second application of this product must be made the following spring to provide season-long control of crabgrass. We would recommend contacting your local extension office for the exact best time to apply this product in your area. This product is only a pre-emergent product that prevents weeds from germinating. It will not kill any actively growing weeds.
Answer last updated on: 09/20/2018