Weeds After Aeration and Overseeding Fescue: What to Do

Seeing a flush of weeds after aerating and overseeding fescue in fall is common. The aeration process brings dormant weed seeds to the surface where they germinate alongside the new grass.

If the weeds are broadleaf types (oval or ragged leaves), you can apply a broadleaf herbicide at half the labeled rate once the new fescue has been mowed two or three times. Repeat in three weeks if needed. This controls weeds without stressing the young grass.