Crabgrass Remnants in Fescue Lawn: Don't Pull, Prevent Next Year

Q: I've put down crabgrass killer on my fescue lawn; weeds are browning. Should I pull remnants before fall reseeding?

A: Pulling crabgrass remnants is satisfying but won't control the weed—each plant dropped hundreds of seeds that will sprout next year unless you apply a weed preventer next March. A vigorously growing lawn also prevents weeds. Keep fescue healthy by fertilizing now, November, February, and April. Mow at 3.5 inches to keep weed seeds in shade.