How to Seed a Patchy Lawn

Overview

A patchy lawn can be the result of an attempt to grow grass in shade or a high-traffic area, a fungal disease or poor lawn cultivation practices. Lawns where growth is not uniform can be repaired through the practice of reseeding. Reseeding a lawn puts more grass seed down and encourages growth in areas where the lawn grass will not currently grow. But unless the problems that caused a patchy lawn are corrected, reseeding is a temporary fix at best.

Step 1

Reseed in early fall or late spring---grass seed often will not germinate in the middle of summer's heat.

Step 2

Mow your current lawn grass to its lowest healthy height---typically this is between 1 and 1½ inches. This will allow light to reach the new grass and help it germinate.

Step 3

Measure the thickness of the lawn thatch on your lawn. If the lawn thatch is thicker than 1 inch, rent a dethatcher and remove a layer of thatch from the lawn.

Step 4

Aerate your lawn with a lawn aerator to help add oxygen and nutrients to the soil and to give lawn seed access to the soil so that it can germinate. Push the aerator over your lawn up to four times, varying the path each time. Aerate until there are approximately 40 to 60 aeration holes in your lawn per square foot.

Step 5

Pour seed into a broadcast seeder and set the machine to distribute seed as you push the machine over your lawn. A broadcast seeder contains a holding chamber and a reel designed to fling seed across the path that you push it over.

Step 6

Water the seed up to four times daily with ¼ inch of water per 1 inch of soil. Decrease the watering frequency gradually once the seeds germinate. Eventually you should water your lawn with 1 inch of water every 10 days.

Step 7

Continue to mow your lawn between 1 and 1½ inches until the new seed reaches this height. Then raise the deck of your mower so that your grass is between 2 and 2½ inches tall.

Things You'll Need

  • Lawnmower
  • Lawn dethatcher
  • Lawn aerator
  • Grass seed
  • Broadcast spreader
  • Garden hose
  • Sprinkler

References

  • University of Minnesota: Leptosphaerulina Blight
  • Iowa State University Extension: Overseeding Lawns
  • University of Florida IFAS Extension: Overseeding Florida Lawns for Winter Color

Who Can Help

  • Extension: Overseeding in Fall Can Repair, Improve Lawn
Keywords: fixing a lawn, patchy lawn grass, reseeding grass lawns

About this Author

Tracy S. Morris has been a freelance writer since 2000. She has published two novels and numerous online articles. Her work has appeared in national magazines and newspapers, including "Ferrets," "CatFancy," "Lexington Herald Leader" and "The Tulsa World."