Barricade 4FL Pre-Emergent Herbicide - 1 Gallon Offers low-rate, season-long control of crabgrass, Poa annua, and other grassy and broadleaf weeds Allows for applications as early as January that last the entire season. Offers dial-in rates for cost efficiency, especially in northern regions Wont stain shoes, fences or other landscape features like Pendimethalin. The use rate ranges from 16-48 oz per acre. See label for your areas best use rate.