If your fescue lawn looks thin, patchy, or worn out after an Oklahoma summer, your first instinct may be to throw down seed as soon as temperatures start cooling off. But with fescue, when you overseed matters almost as much as how you overseed. Seed too early, and young grass can struggle against lingering summer heat. Wait too long, and new seedlings may not have enough time to establish strong roots before cold weather arrives. That makes fall overseeding a balancing act —