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Overseed a Thin Lawn

⏱️1 hr + watering for 3 weeks💰$30–80🟢Beginner4.7 (134 reviews)

Thicker grass crowds out weeds naturally. Overseeding in fall gives you a noticeably better lawn by spring.

Time it right

Cool-season grasses (Kentucky bluegrass, fescue): early fall, 6 weeks before first frost. Warm-season grasses (Bermuda, zoysia): late spring when soil reaches 65°F.

Mow short and bag clippings

Cut the lawn to 2" and bag the clippings. Seed needs to touch soil; long grass blocks contact.

Rake and aerate if needed

Rake up dead thatch. If soil is compacted (common in high-traffic areas), rent a core aerator — it makes a huge difference.

Spread the seed

Use a broadcast spreader and apply at the rate on the bag (usually ~4 lbs per 1,000 sq ft). Walk in two directions — first north-south, then east-west — to avoid stripes.

Top-dress lightly with compost

A 1/4" layer of compost or topsoil holds seed in place and feeds germination.

Water daily until established

Light watering twice a day for the first 2 weeks, then gradually reduce to a normal deep-soak schedule once grass is 2" tall.

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