Jonathan Green Veri-Green Crabgrass Preventer Plus Lawn FertilizerJonathan Green Veri Green Crabgrass Preventer plus Lawn Fertilizer feeds and greens up the lawn for up to three full months and provides pre emergent control of crabgrass. When applied prior to germination it controls other weeds such as goosegrass, dallisgrass, chickweed, henbit, and oxalis. This product contains an advanced herbicide known as Dimension that unlike other Crabgrass Controls provides post emergent control, meaning it will kill weeds