Overseeding, or adding new seeds to existing lawns, improves bare spots, thickens turf and helps crowd out weeds.

Overseeding Do’s:
  1. Overseed your lawn as needed to strengthen the turf.
  2. Seeds should be carefully chosen based on your area and on your existing lawn type (check with your local county extension office for guidance). Try to select seed that has at least an 80% germination rate and contains less that one percent weed seeds.
  3. Prepare the area to be overseeded by raking the entire area. Next, spread out the grass seeds, making sure that the seeds are touching the soil. Finally, cover the seeds lightly with top-soil or other top-dressing.


Are all grass seeds the same?

No. Many “bargain” seeds contain common, low-quality grasses that may not adapt well to your lawn. Grass from poor-quality seeds tends to be susceptible to disease. Don’t try to save money when purchasing grass seed! Instead, buy the best quality seed you can afford. Whenever possible, purchase seed that contains grass types with specific (varietal) names. The best time to sow the seeds is right after you’ve dethatched and aerated your lawn. Always be sure to rake and remove thatch and weeds before seeding. If you have aerated, rake roughly two-thirds of the removed cores back into the holes, then spread the grass seeds. Cover the lawn with a starter fertilizer if you wish, then cover the seeds with the remaining third of core dirt. If you have not aerated first, you can sow the seeds into the lawn with a seeding machine. Plan to cover the seeds with a thin layer of straw or cheesecloth to help keep the seeds from blowing away or from being eaten by birds.