When should I start reseeding my lawn?

Start reseeding as soon as the ground thaws, but you’re on a timer. For cool-season grasses like fescue, bluegrass, and rye, seed in the narrow window between the last frost and when soil temps hit 55°F — usually early to mid-spring. For warm-season grasses like Bermuda and St. Augustine, wait until soil is consistently 65°F or above. The biggest mistake is seeding too late, which fries tender seedlings in summer heat.