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Lawn ยท guide

How To Overseed A Lawn

A focused guide to how to overseed a lawn for planning your next yard project.

Overseeding adds seed to an existing lawn; success depends on seed reaching soil, not simply being spread over thatch.

Homeowner overseeding an existing patchy lawn, hands only
Illustrative project example

How to plan it

  1. Measure the lawn and choose a suitable seed
  2. Mow and prepare thin areas for seed-to-soil contact
  3. Apply at the overseeding label rate and follow local watering guidance
Check before buying: Correct the cause of thinning before buying seed.

Turn this into a quantity

Record your site measurements first. Then use a calculator with the depth, application rate, or coverage from the actual material specification.

Open grass seed calculator

Source and limits

Penn State Extension: Lawn establishment. Local conditions and manufacturer guidance may call for different materials or installation details.